Airmark GBW Series Bedienungsanleitung

INSTALLATION GUIDE

GBW & GFW Series - Vertical Wall

Mount Air Handler (Hydronic Heat)

1. Safety Instruction

!WARNING

Potential safety hazards are alerted using the following symbols. The symbol is used in conjunction with terms

that indicate the intensity of the hazard.

This symbol indicates a potentially hazardous situation, which if not avoided,

could result in serious injury, property damage, product damage or death.

This symbol indicates a potentially hazardous situation, which if not avoided,

may result in moderate injury or property damage.

CAUTION

Only factory authorized kits and acces-

sories should be used when installing or

modifying this unit unless it is so noted in

these instructions. Some localities may require a licensed

installer/service personnel.

CAUTION

Certied technicians or those individuals

meeting the requirements specied by

NATE may use this information. Property

and product damage or personal injury hazard may occur

without such background.

!WARNING

All power sources should be disconnect-

ed prior to servicing. Failure to do so may

cause personal injury or property damage.

!WARNING

Product designed and manufactured to

permit installation in accordance with lo-

cal and national building codes. It is the

installer’s responsibility to ensure that product is installed

in strict compliance with national and local codes. Manufac-

turer takes no responsibility for damage (personal, product

or property) caused due to installations violating regula-

tions. In absence of local/state codes, refer to National Elec-

tric Code: NFPA 90A & 90B Uniform Mechanical Code.

!WARNING

When this unit is installed in an enclosed

area, such as a garage or utility room with

any Carbon Monoxide producing devices

(i.e. automobile, space heater, water heater etc.) ensure that

the enclosed area is properly ventilated.

!WARNING

The unit is designed for operation with

108/120 V, single phase, 60 Hz power sup-

ply. Airmark will not be responsible for

damages caused due to modication of the unit to operate

with alternative power sources.

!WARNING

Unit is not approved for outdoor installa-

tions.

!WARNING

2. Ensure These Steps are Completed to Reduce

Chances of a Frozen Hydronic Coil

• Ensure the air handler motor and control board are receiving

proper power input per the wiring diagram.

• Ensure the hydronic coil has access to a constant water supply as

loss of water movement can lead to a frozen coil.

• Prime the water circulator pump using the purge valve per the

“Start-Up” section of this installation guide.

• Run the pump for ve minutes after priming to ensure no air is in

the system.

• If any interruption to the water supply occurs, prime the water

circulator pump again.

• Insulate the water piping in unconditioned spaces or within

structures that may be unoccupied during freezing conditions.

• If the air handler does not have an internal pump and/or relies on

an external boiler system for hot water, the installer may need to

rewire the system to ensure that it maintains access to a constant

water supply.

4. Installation Preparation

4A. Clearances

4B. Recess Mounting or Wall Mounting Option

4C. Condensate Drain

Read all the instructions in this guideline carefully while paying spe-

cial attention to the WARNING and CAUTION alerts. If any of the

instructions are unclear; clarify with certied technicians. Gather all

the tools needed for successful installation of the unit prior to begin-

ning the installation.

This unit is designed for zero clearance installation on three sides

and adequate clearance to provide access for service in the front.

A minimum of 2.5 – 3.5 feet clearance is recommended on the front

end (Fig 4A-1).

These units are designed to be installed in a small room where they

can be mounted above a water heater or recessed into a wall. The

unit should be installed in Vertical Upow position ONLY.

If installing the air handler into a recessed wall, the unit must leave

clearance to allow the removal of the front panels. The bottom of the

unit should also rest on a sturdy platform or oor. The unit must be

level to allow condensate drainage.

These air handlers come with an offset mounting bracket that at-

taches the air handler to the wall when the unit is ush mounted to

the wall.

The drain lines must be installed with ¼” per foot pitch to provide free

drainage. A condensate trap MUST be installed on the primary drain

line to ensure proper drainage of the condensate. The trap must be

installed in the drain line below the bottom of the drain pan (Fig.

4C-1)

Since coil is upstream of the blower, all

drains MUST be trapped or sealed. Failure

to do so will result in condensate overow

from the drain pan. Airmark will NOT be responsible for any

damages resulting from failure to follow these instructions.

CAUTION

The drain pan has primary (red) and secondary (white) drain connec-

tions. If a secondary drain line is required, it should be run separately

from the primary and should terminate in a highly visible location.

Condensate disposal through the secondary drain line indicates that

the primary drain line is plugged and needs cleaning. If a second-

ary drain line will not be provided, plug the secondary drain. Drain

plugs are NOT to be reused without plumbers tape or putty. Drain

line connection should be nger tightened, then turned no more than

one complete turn as needed to ensure a rm connection. DO NOT

overtighten connection or damage may occur.

Fig 4A-1. Minimum Clearance for Air Handler

Fig 4C-1. Condensate Drain Trap

3. Inspection

Drain lines from the auxiliary drain pan

should NOT be connected to the primary

drain line of the coil.

CAUTION

üOn receiving the product, visually inspect it for any major shipping

related damages. Shipping damages are the carrier’s responsibility.

Inspect the product labels to verify the model number and options

are in accordance with your order. Manufacturer will not accept dam-

age claims for incorrectly shipped product.

If the drain pan is constructed of nylon

or plastic; use Teon tape to connect the

drain lines to the threads in the drain pan.

DO NOT USE SOLVENT BASED PIPE DOPE. THIS WILL RE-

DUCE THE LIFE OF THE PAN.

CAUTION

4D. Ductwork

Duct systems should be installed in accordance with standards for

air-conditioning systems, National Fire Protection Association Pam-

phlet No. 90A or 90B. They should be sized in accordance with Na-

tional Environmental

System Contractors

Association Manual K,

or whichever is appli-

cable.

On any job, non-am-

mable exible collars

should be used for

the return air and dis-

charge connections to

prevent transmission

of vibration (Fig 4D-1).

Although these units

have been specially

designed for quiet vi-

bration-free operation, air ducts can act as soundboards, and if poor-

ly installed, amplify the slightest vibration to the annoyance level.

All main supply and return air drops should be properly sized as

determined by the designer of the duct system and should not nec-

essarily be the size of the duct ange openings of the unit. (The

duct size should never be smaller than the ange openings of the air

handler supply and return air openings.)

A lter rack is provided for a 1”X20”X20” nominal size lter (Fig 4D-

4). Inspect and clean or replace lter every month. A blocked lter

can reduce air ow to the coil and hinder the performance of the

system.

If an accessory grill is being used, the front access panel should be

removed and discarded (Fig 3D-3).

These models have a bottom or front return. Discard the drain ac-

cess panel in the bottom of the unit if this is a bottom return applica-

tion (Fig 4D-2). In case of a front return application, the front access

panel should be removed and discarded.

It is recommended that wherever supply and return air sheet metal

ducts pass through unconditioned areas, they be insulated to pre-

vent excessive heat loss during heating operation. When applied in

conjunction with summer air conditioning, sheet metal duct routed

through unconditioned areas should be insulated and have an out-

side vapor barrier to prevent formation of condensation.

5. Installation

Ensure that the unit is adequately sized.

The tonnage of the outdoor unit should

never exceed the tonnage of this unit.

CAUTION

The coil was manufactured with a dry ni-

trogen pre-charge. Release the pressure

through the Schrader valve test port prior

to installation. If holding pressure is not present, return coil

to distributor for exchange.

!WARNING

Some Airmark coils may include a Schrad-

er valve on the suction manifold. Ensure

that the Schrader valve and valve core

(where present) are protected from heat during brazing and

installation to prevent leakage. Use a core removal tool to

temporarily remove the core when brazing. Replace the core

once brazing is completed.

CAUTION

Fig 4D-1.

Fig 4D-2.

Fig 4D-3.

Fig 4D-4.

ü Clean coil ns with degreasing agent or mild detergent and rinse

ns clean prior to installation.

üThe refrigerant line sizes should be selected according to the rec-

ommendations of the outdoor unit manufacturer.

üCare must be taken to ensure all connection joints are burr-free

and clean. Failure to do so may increase chances of a leak. It is

recommended to use a pipe cutter to remove the spun closed end of

the suction line.

üTo reduce air leakage, rubber gommets may be present where the

lines pass through the coil case. To avoid damage, remove grom-

mets prior to brazing by sliding over the lines. Use a quenching cloth

or allow the lines to cool before reinstalling the grommets.

üUse of wet rags/quenching cloth is highly recommended to prevent

weld-related damages to the casing and Schrader valve (if present).

Only lead free solder should be used to

connect water (hydronic) coil to the hot

water source.

CAUTION

Prior to connecting the water (hydronic)

coil, make sure that the hot water supply

is turned off. Water from the heater could

be extremely hot and might result in burns and other person-

al injury along with equipment damage. Ensure that proper

safety gear is being used prior to making connections.

!WARNING

7. Connecting Ducting

8. Metering Devices/Liquid Line Connection

1. Secure supply air ducting to the top of the air handler. Canvas con-

nectors are recommended for reducing potential noise transmission.

2. If the bottom return air opening is

being used, remove the bottom panel.

If a front return is being used, this pan-

el will remain in place.

3. Secure the return air ducting to the air handler cabinet.

4. Secure the bracket with

screws sufcient to hold 4X the

weight of the air handler.

5. Position the air handler on the

wall with the bracket on the air

handler slightly higher than the

bracket secured on the wall.

Lower the air handler so that the

brackets engage. Check the unit

for level, both side to side and

front to back.

Note: Photos are for basic illustration purposes only. Actual equip-

ment conguration may differ from that shown.

Airmark coils are available with two kinds of metering devices a)

owrator or b) TXV. The following instructions are separated into

sections by metering device.

Use Piston sizes recommended by the

outdoor unit manufacturer whenever pos-

sible. The piston should be sized accord-

ing to the capacity of the outdoor unit.

CAUTION

Fig 8A-1. Flowrator assembly components

Failure to install the proper piston can

lead to poor system performance and

possible compressor damage.

!WARNING

I. Installation

I-1. Disassemble owrator body

using two wrenches and un-

screwing with a counterclockwise

motion.

8A. Flowrator Coils

I-3. Slide the attachment nut onto

the liquid line stub out.

Be aware of the Teon O-ring. Be sure to

replace the O-ring to attain a proper

seal. (The Teon O-ring is located between

the two halves of the owrator)

CAUTION

I-2. Replace the Teon O-ring

(located between the halves).

Discard Schrader if present.

O-ring

6. Mounting Air Handler To Wall

1. Install the air handler in a level position side to side and front to

back. If this step is not followed, condensate water damage may oc-

cur. (Both ush mount and recess mount congurations.)

2. Determine where the air han-

dler is to be placed on the wall.

Place the hanging bracket on

the wall and align the holes of

the bracket with the wall studs.

Level the hanging bracket and

mark the holes to drill pilot holes

for the screws.

3. Drill the pilot holes.

I-4. Braze the stub-out portion to the liquid line and let cool.

I-6. Tighten the nut to a torque of approximately 10-30 ft-lbs. Do NOT

overtighten the nut. Overtightening will impede the piston movement

during operation.

I-5. Taking care that the white

Teon seal is still in place inside

the owrater body, rmly seat the

stub and screw the attachment

nut to owrater body.

O-ring

During some installations, a piston change may

be required. If so, the installer MUST change the

piston. Use piston sizes recommended by the

outdoor unit manufacturer. If a sizing chart is not

available, use the piston size chart provided be-

low to size the required piston. The size of the

piston is stamped on the piston body (Fig 8A-2).

II. Piston Replacement

Fig 8A-2

Use the chart below when matching coil with an outdoor unit with a

different nominal capacity than the coil.

Note: Photos are for basic illustration purposes only. Actual equip-

ment conguration may differ from that shown.

II-4. Slide the 13/16” nut over

the lineset and separate the two

halves of the owrator.

Be aware of the Teon O-ring. Be sure to

replace the O-ring to attain a proper

seal. (The Teon O-ring is located between

the two halves of the owrator)

CAUTION

Pay close attention to the piston orienta-

tion. The pointed end of the piston MUST

go into the distributor body, towards the

coil. Failure to ensure this orientation will cause the piston

to be bypassed during operation which might damage the

outdoor unit.

CAUTION

II-6. Replace the piston with one

of the correct size. Do not force

the new piston into the body.

Make sure the piston moves

freely in body.

II-1. Evacuate the system as per manufacturer guidelines and rec-

ommendations

II-2. Turn the 13/16” nut once to release any residual pressure in the

coil.

II-3. After ensuring that the coil

is free of any residual pressure,

disassemble the owrator body

completely using two wrenches.

Take great care not to distort the

feeder tubes. The wrench used

to clasp the nut should be turned

in counter-clockwise direction to

unscrew the nut.

II-5. Pull the piston out using a

small wire or pick. Verify the pis-

ton size (size is typically stamped

on the body of the piston - Fig

8A-2). If a different piston size

is required by the outdoor unit

manufacturer, replace the piston

using the small wire provided with

the piston kit.

II-7. Assemble the two halves correctly and ensure that the white

Teon O-ring is present between the two halves (See I-5). Slide the

13/16” nut onto the distributor body.

II-8. Tighten the nut to a torque of approximately 10-30 ft-lbs. Do NOT

overtighten the nut. Overtightening will impede the piston movement

during operation.

II-9. If present, slide the rubber grommet back to position to prevent

air leakage.

8B. TXV Coils

Fig 8B-1. Components of a typical TXV assembly

The valves should be sized according to

the capacity of the outdoor unit. Failure to

install the right valve can lead to poor per-

formance and possible compressor damage.

CAUTION

Ensure that the TXV bulb is in direct con-

tact with the suction/vapor line. Gap be-

tween the bulb and tube should be avoid-

ed. Failure to do so will impair the proper functioning of the

TXV valve.

CAUTION

I. TXV Bulb Horizontal Mounting

The orientation and location of the TXV bulb has a major inuence

on the system performance.

If the TXV sensing bulb is mounted verti-

cally; the capillary MUST be directed up-

wards. The bulb must be mounted on the

wall opposite to that being directly hit by the refrigerant and

oil leaving the distributor tubes.

CAUTION

II. TXV Bulb Vertical Mounting

Fig 8B-3. Recommended location

for vertical TXV bulb mount

As recommended in Section

8B-I, the TXV sensing bulb

should be mounted in a hori-

zontal plane in relation to the

suction/vapor line. However,

some installation congura-

tions may require that the

sensing bulb be mounted ver-

tically. In this instance, place

the bulb opposite the piping

wall being hit by refrigerant

and oil leaving the distributor

tubes, and with capillary tubes

directed upwards as shown in

Fig. 8B-3.

III-3. Replace the Teon O-ring

seal in place (located between

the halves).

O-ring

III-2. Remove the existing ow-

rator piston using a small wire

or pick.

Note: Photos are for basic illustration purposes only. Actual equip-

ment conguration may differ from that shown.

III. Field-Installed TXV Retrot

When installing an expansion valve, it is not necessary to slide the

coil out of the housing.

III-1. Disassemble the owrator

body using two wrenches. Un-

screw the body with a counter-

clockwise motion.

Ensure that the TXV selected is compat-

ible with the refrigerant used in the out-

door system (R22 or R410A). TXV caps are

painted green for R22 or pink for R410A. In absence of col-

or, the caps will be marked with the compatible refrigerant.

CAUTION

The sensing bulb and TXV body MUST be

protected from overheating during braz-

ing. The sensing bulb and TXV body must

be covered using a quench cloth or wet cloth when brazing.

Pointing the brazing ame away from the valve and sensing

bulb provide partial protection only.

!WARNING

It is recommended that the TXV bulb be installed parallel to the

ground (on a horizontal plane). The bulb position should be at

2 o’clock or 10 o’clock. Fig. 7B-2 shows the recommended position

for the TXV bulb installation in the horizontal plane.

The TXV sensing bulb SHOULD be mounted on the suction line ap-

proximately 6” from the TXV or coil housing using the metal clamp

provided. In order to obtain a good temperature reading and correct

superheat control, the TXV sensing bulb must conform to ALL of the

following criteria:

1. The sensing bulb MUST be in direct and continuous

contact with the suction line.

2. The sensing bulb should be mounted horizontally on

the suction line.

3. The sensing bulb MUST be mounted at the 2 o’clock or

10 o’clock position on the circumference of the suction line.

4. The sensing bulb MUST be insulated from outside air.

A properly mounted sensing bulb will prevent false readings caused

by liquid refrigerant that may have formed inside the suction/vapor

line. Insulation will protect the sensing bulb from false readings due

to contact with warm air.

Fig 7B-2. Recommended location for horizontal TXV bulb mount

Bulb position at

2 o’clock or

10 o’clock

III-4. Inspect the TXV box to conrm that the valve is compatible

with the refrigerant in the system.

Male

(Inlet) Female

(Outlet) III-5. Remove the valve from

the box and note the loca-

tion of the inlet side (threaded

male port) and the outlet side

(female swivel nut port).

III-8. Braze the stub-out portion to the liquid line and let cool.

III-7. Slide attachment the nut onto the liquid line stub out

(See 8A, I-3)

Do not attempt to touch brazed joints

while hot. Severe burns may result.

!WARNING

O-ring

III-6. After ensuring that the

Teon O-ring seal is still in place

inside the owrator body, screw

the female swivel nut onto the

owrator body.

O-ring III-9. Remove the additional Tef-

lon O-ring seal from the box and

place on the shoulder just inside

the TXV inlet port. Screw the nut

attached to the stub-out portion of

the owrator body onto the inlet

port of the TXV.

A. Remove the valve stem from

the Schrader port mounted on the

suction line.

B. Screw are nut on TXV equal-

ization tube on to the Schrader

valve stem.

III-10. Tighten all connections taking care to use proper back up.

III-12a. Some Airmark coils come with a Schrader valve on the suc-

tion line. If a Schrader port is present:

III-12b. In some cases, a suction line schrader port may not be

present. If a Schrader port is NOT present:

When handling or manipulating the equal-

izer tube, take great care not to kink or

make extreme bends in the tubing.

CAUTION

III-11. Remove the valve identication sticker from the valve and

place it adjacent to the Airmark model number on unit name plate.

A. Install a eld-supplied braze-on schrader

valve like that shown on the suction line near the

intended sensing bulb mounting location. Fol-

low valve manufacturer instructions and recom-

mendations for installation.

B. Attach equalizer tube to valve as described in

section III-12a above.

III-13. Mount the sensing bulb as described in section 8B-I or 8B-II.

9. Connecting Refrigerant Lines

11. Electrical Installation

1. Release nitrogen hold-

ing charge by depressing the

Shrader Valve at the liquid line

connection on the air handler.

If no gas releases from the air

handler, contact distributor re-

garding potential leak.

2. Cut off Shrader Valve tting at

the liquid line connection. Use a

tubing cutter for this step. Clean

the burr from the cut tubing to

reduce the chance of future

leaks. Connect the liquid line to

the tubing at the indoor unit.

3. Use a tubing cutter to remove

the spun end from the suction

line connection at the air han-

dler. Clean the burr from the cut

tubing to reduce the chance of

future leaks.

4. To avoid heat damage to grommets where present, remove these

prior to brazing by sliding them over the refrigerant lines and out of

the way.

5. Check to determine if the

evaporator coil has a Shrader

tting on the suction manifold.

If yes, remove the valve core

to prevent heat damage during

brazing. Replace the valve core

once the piping has cooled.

6. If the air handler has a TXV

metering device, remove the

sensing bulb from the suction

line prior to brazing to prevent

heat damage from occurring.

Replace the sensing bulb once

the piping has cooled.

7. Flow nitrogen through the piping when brazing.

8. Braze both refrigerant line connections using proper brazing pro-

cedures.

9. When all line connections are brazed, perform a proper system

evacuation procedure per the outdoor unit manufacturer instructions.

10. Seal the penetration open-

ings where the lineset piping en-

ters the air handler cabinet.

1. Following outdoor unit manufacturer instructions and recommen-

dations, charge the system with dry nitrogen to a maximum pressure

of 150 PSIG.

3. If any leaks or are discovered, relieve system pressure and repair

leaks. Repeat steps 1-3.

4. With no leaks or weak connections present, evacuate the system

and charge as per the outdoor unit manufacturer instructions and

specications.

10. Leak Check

2. Check all brazed and screw-

on line connections by applying a

soap solution to the joint. A leak

will produce bubbles in the soap

solution.

These units are designed for single phase 120 volts, 60 Hz power

supply. Wire selection and wiring must be in accordance with the Na-

tional Electric Code and/or local codes. Unit terminals are designed

to accommodate copper or aluminum wiring. If aluminum wiring is

used, please observe special precautions relative to sizing, wire con-

nections and corrosion protection.

Fig.11-1 shows the typical electrical connections required for A/C

only and heat pump applications.

Fig 11-1.

Line voltage wiring should be

routed through the access holes

at the top of the air handler.

Proper electrical conduit con-

nection ttings should be used.

Connect the power wiring to the

line side connections on the air

handler. The electrical ground

wire should be connected to the

grounding lug. Ensure both the

eld supplied ground wire and air

handler GREEN ground wire are

both secured to the grounding

lug of the air handler (Fig 11B-2).

The aquastat (AQ) jumper must be in the

OFF position at all times, except for when

an aquastat is used. If the jumper is moved

to the ON position without installing an aquastat, the blower

will not be energized.

CAUTION

The unit ships with a micro-processor based board which controls

the electrical functioning of the unit. An inspection of the controls is

recommended prior to startup.

Fig.11C-2 provides a schematic of the control board present in the

unit. The units ship from the factory with the aquastat jumper in the

OFF position (right two pins) and the heating selector in the HW

position (right two pins). If an aquastat is used in the application, the

jumper should be changed to the ON position (left two pins).

Note: Terminals T and N located on the top right side of the board

are not intended for eld use and should be left disconnected.

Fig 11A-2.

Fig 11B-2.

Fig 11C-2.

During cooling mode operation, indoor blower wire “G” will energize

a time delay relay located on the control board inside the air handler.

After a short time delay period, the time delay relay will send out a 24

volt signal to the low voltage terminal on the motor. (See Schematic

Fig 22-1.) Fan time delay periods are 30 seconds ON delay and 120

seconds OFF delay. The Y wire from the thermostat is not connected

at the air handler. This wire goes directly to the outdoor unit 24 volt

wiring to turn on the outdoor condensing unit when a call for cooling

takes place. The 24 volt common for the outdoor unit circuitry is con-

nected at the air handler brown wire. (See Fig11-1.)

The hydronic heater low voltage wiring terminal “W” is wired directly

from the thermostat to the air handler. The indoor blower, on a call for

heat, will ON delay for a period of 5 seconds. When the call for heat

has been satised, the indoor blower will have an OFF delay time

period of 60 seconds.

11B. Two Stage Condensing Units

11C. Jumper Placement

11D. Pump/Valve/Boiler Wiring

Operating CFM based upon each speed tap number is shown on

the electrical wiring diagram of the unit. Final air volume adjustments

should be made by referencing total external static pressure (Table

11B-1).

If the outdoor condensing unit is a two stage model, a eld provided

Y2 wire can be connected to the motor using an electrical spade con-

nector. The number 4 and 5 terminals on the motor are speed taps

that will increase the blower speed for second stage cooling opera-

tion. Both the G and Y2 terminals will be energized at the same time

during a call for second stage blower speed operation. The motor will

run at the speed where the Y2 wire is connected (Fig 11B-1).

Fig 11B-1.

Table 11B-1.

11A. Single Stage Cooling

On units shipped from the factory with a pump installed (Fig 11D-3),

the pump will be energized on a call for heat.

On units that were shipped without factory installed pumps, two

black wires should be connected to the terminals marked “BOILER”

T T (see Fig 11C-2). In applications where a boiler provides the hot

water supply, these wires should be connected to the boiler control

wiring. Terminals “BOILER” T T are normally open dry contacts.

In applications where a valve is used to regulate the hot water supply,

the two black wires located on the “BOILER” T T terminals should be

removed and placed on the two terminals marked “VALVE”. These

wires should be connected to a 24V valve according to local require-

ments and instructions of the valve manufacturer.

On a call for heat, 24V will be sent to the eld-installed valve or pump

relay, the valve will open or pump relay will close contacts allowing

the pump to run. Water will circulate through the water (hydronic) coil

for 60 seconds prior to energizing the blower. After the thermostat is

satised, the blower will continue to stay energized for a minimum of

30 seconds. The additional blower run time helps maximize heating

efciency.

Fig 11D-3.

12. Condensate Drain

Air volume needs to be set to the level recommended by the outdoor

unit equipment manufacturer. Most systems will require around 400

CFM of indoor air for every 1 ton of system cooling capacity. The air

volume must be set prior to attempting system charge.

This air handler uses a constant torque ECM motor. This motor

will try to maintain proper motor torque to achieve programmed air

volume levels at varying levels of external static pressure. The air

volume level produced by the air handlers at varying external static

pressure levels is shown in Table 12-1.

Use a Magnehelic Gauge with a 1” scale and two static pressure

tips to measure the static pressure during the air volume adjustment

procedure (Fig. 13-1). The high port static pressure tip should be

placed in the supply duct near the outlet of the air handler. The low

port static pressure tip should be placed in the return air duct near

the entrance to the air handler. The factory provided air lter should

be in place inside of the air handler.

13. Air Volume Adjustment

Table 13-1.

Fig. 13-1

1. Select a starting speed tap from the CFM table.

The blower motor has selectable speed taps labeled 1 thru 5 (Fig.

13-2). The speed taps are energized by 24 volts received from the

time delay relay. When two stage cooling units are used, both the

rst and second stage fan speed taps will be energized at the same

time. The motor will run at the speed generated at the highest motor

speed tap.

2. Call for fan only operation at the thermostat. .

3. Read the external static pressure level on the Magnehelic gauge.

4. Make speed tap selection changes to get the air volume as close

as possible to the required level. .

Fig. 13-2

11E. Freeze Protection Sensor Wiring

The freeze protection sensor is connected to the “FP” and “R“ ter-

minals. This sensor is normally open and will close when the sensor

detects a temperature of less than 40ºF. The pump will operate and

stay ON for a minimum of 30 seconds.

The board has a built-in timer which circulates hot water 6 times a

day for 60 seconds to prevent the hydronic coil from freezing.

1. Condensate drain is located at front as shown in picture with pri-

mary and secondary drain port.

2. Pipe condensate system using proper PVC ttings.

3. Ensure a minimum 2” trap

is installed in the condensate

drain. Locate the trap near to

the connection opening on

the air handler. See illustra-

tion.

SECONDARY

DRAINPORT

PRIMARY

DRAINPORT

REVISIONS

ERN

ZONE

REV.

DESCRIPTION

DATE

CHECKED BY

TBD

INITIAL RELEASE

10/23/2017

A A

B B

DO NOT SCALE DRAWING

Stack up Analysis

SHEET 1 OF 1

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES

SCALE:

LBS

REV

PART. NUMBER

SIZE

TITLE:

NAME

DATE

ENG APPR.

DRAWN BY

MATERIAL

DECIMAL: ANGULAR:

XXX

.015 2°

.03

PROPRIETARY AND CONFIDENTIAL

THE INFORMATION CONTAINED IN THIS

DRAWING IS THE SOLE PROPERTY OF

ASPEN MANUFACTURING CO.

ANY

REPRODUCTION IN PART OR AS A WHOLE

WITHOUT THE WRITTEN PERMISSION OF

ASPEN MANUFACTURING CO.

PROHIBITED.

THIRD ANGLE PROJECTION

TOLERANCES:

WEIGHT:

Everything's Right Here

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