Bard QW2S-QW5S Water-to-Air H Bedienungsanleitung

F1915 (2012 04) Page 1 of 6

BARD MANUFACTURING COMPANY, INC.

QW2S-QW5S Water-to-Air H/P

Engineering Specification Guide

1.0 GENERAL

Furnish and install a self-contained, vertical, floor standing, heat pump to

be manufactured by Bard Manufacturing Company, Inc. The unit shall be

approved and Listed by Intertek ETL Listed (ETL US/C). Unit shall be

factory assembled, pre-charged, pre-wired, tested and ready to operate.

Unit performance shall be AHRI Certified in accordance with ISO Standard

13256-1:1998 “Water to Air and Brine to Air Heat Pumps”, which includes

watt allowance for water pumping. Unit shall include 5 year parts warranty

covering compressor, parts, and heat exchange coils, subject to terms and

conditions of Bard Limited Warranty Agreement.

Unit efficiency shall be specified in terms of EER and COP.

Manufacturers: Capacities shall be as indicated on drawings and units

shall be manufactured by Bard Manufacturing Company, Inc. or prior

approved equal.

2.0 CONSTRUCTION FEATURES

2.1 CABINET

Constructed of 20 gauge pre-painted or vinyl laminated galvanized

steel. Choices available are either two-tone (vinyl) finish with “slate”

front panels and “platinum” cabinet for designer appearance, (gray)

or (beige) painted steel (select one). Vinyl finish is very resistant to

scratching and marring and is easy to clean. Tamper resistant

fasteners are provided for access panels. Unit includes built-in

rollers for each installation into wall sleeve and removal for service,

if necessary. Front panel is hinged and lockable for filter service and

access to primary functional electrical controls.

2.2 INSULATION

Cabinet is fully insulated with foil covered, high-density fiberglass

insulation with sealed edge treatment and special sound deadening

insulation material in the compressor section. All insulation is

designed to resist mold and mildew growth and facilitate ease of

cleaning.

F1915 (2012 04) Page 2 of 6

2.3 COMPRESSOR

All models shall use a high efficiency scroll compressor with step

capacity providing 2 stages of control. The compressor shall be

covered by a 5-year parts warranty. The refrigeration circuit shall be

equipped with factory installed high and low-pressure controls. The

refrigeration control shall be a factory installed TXV. Compressor

shall be mounted on isolation rails with double grommets. Unit shall

be provided with R-410A (HFC) non-ozone depleting refrigerant. Unit

shall be provided with liquid line filter/drier.

Current sensing relay shall be used to detect high amps caused by

high ambient and/or low voltage and to shift compressor to 1st-stage

operation until conditions corrected

2.4 COAXIAL WATER COIL

All models shall have either cupronickel or copper (SELECT ONE);

water coil, fully insulated, with double o-ring connections. Copper

coils should not be used on open wells.

2.6 INDOOR BLOWER MOTOR

The indoor blower motor shall be a variable speed (ECM) type to

produce the same rated airflow from 0 to .8 inch WC of external static

pressure (.5 on Q24W model) at low sound levels. The motor is to be

self-adjusting to provide proper rated airflow at high static pressures

without user adjustment or wiring changes by the user. The motor

shall be programmed for 20-second ramp up and 60-second down

rate for quiet, smooth starting and stopping. ECM motor shall

include preprogrammed speeds for ventilation mode, first stage

operation, second stage operation, ducted operation, and non-

ducted operation.

2.7 ELECTRICAL COMPONENTS

Electrical components are easily accessible for routine inspection

and maintenance through front service panels. Circuit breaker is

standard on all 208/230-volt models and rotary disconnect standard

on all 460-volt models. Circuit breaker/rotary disconnect access is

through lockable access panel. Lock and key are provided as

standard equipment. Unit shall have single point entry for line

voltage.

2.8 CONTROL CIRCUIT

The internal control circuit shall consist of a current limiting 24VAC

type 65VA transformer with circuit breaker. To prevent rapid

compressor short cycling, a five-minute time delay circuit shall be

factory installed. Two low-pressure controls shall be included as

F1915 (2012 04) Page 3 of 6

standard. One shall be used for fresh water applications, the other

for protected (antifreeze) closed systems. The factory wired switch is

for fresh water.

Phase rotation protection and phase failure protection shall be

standard factory installed features on all equipment with three-phase

power. If unit is wired incorrectly phase monitor will lock out

compressor operation and red warning light shall energize. Once

power wiring is corrected at field power wiring location, a green light

will energize on phase monitor. If a phase of power is lost, the phase

monitor will also lock out.

2.9 SERVICE FEATURES

The unit shall include a diagnostic light to indicate when service is

required. System Service shall detect high or low-pressure control

operation.

3.0 LOOP MODULE PUMPING SYSTEM

All models shall be designed with mounting and wiring provisions

for field installed pump module option, when unit is applied with

ground loop system.

4.0 VENTILATION OPTIONS (Select One)

Q-Tec models are designed to provide optional ventilation packages to

meet all of your ventilation and indoor air quality requirements. All

ventilation packages are factory installed.

4.1 BAROMETRIC FRESH AIR DAMPER STANDARD

The barometric fresh air damper is a standard feature on all models.

It allows outside ventilation air, up to 25% of the total airflow rating

of the unit, to be introduced through the air inlet openings and to be

mixed with the conditioned air. The damper opens during blower

operation and closes when the blower is off. Adjustable blade stops

allow different amounts of outside air to be introduced into the

building and can be easily locked closed if required.

4.2 BLANK OFF PLATE OPTIONAL

A blank off plate covers the air inlet openings, which restrict any

outside air from entering the unit. The blank off plate should be

utilized in applications where outside air is not required to be mixed

with the conditioned air.

4.3 COMMERCIAL ROOM VENTILATOR OPTIONAL

F1915 (2012 04) Page 4 of 6

The built-in commercial room ventilator (CRV) is internally mounted

and allows outside ventilation air, up to 50% of the total air flow

rating of the unit, to be introduced through the air inlet openings. The

CRV shall be modular and easily added or removed from the unit

cabinet. It includes a built-in exhaust air damper. The damper can

be easily adjusted to control the amount of fresh air supplied into the

building. The CRV can be controlled by indoor blower operation or

field controlled based on room occupancy. Unit complies with

ANSI/ASHRAE Standard 62.1 Ventilation for Acceptable Air Quality.

Two Models Available: Spring Return on Power Loss or

Deactivation - Vent Option V

Power Return (will not close on power loss)

– Vent Option P

4.4 ENERGY RECOVERY VENTILATOR OPTIONAL

The Energy Recovery Ventilator (ERV) shall consist of 1 or 2 rotary

wheels in an insulated cassette frame with seals, drive motor and

belt. The ERV assembly shall also include intake and exhaust

blowers. The entire assembly shall easily slide in or out of the unit

cabinet, allowing for maintenance or replacement. The total energy

wheel shall be coated with silica gel desiccant, permanently bonded

without the use of binders or adhesives. The coated segments shall

be washable with detergent or alkaline coil cleaner and water.

Desiccant shall not dissolve or deliquesce in the presence of water

or high humidity. All diameter and perimeter seals shall be provided

as part of the cassette assembly and shall be factory set. Drive belts

shall not require external tensioners or adjustment. Cassette wheels

shall include rims to prevent belts from slipping off wheels. Intake

and exhaust blowers shall have selections of high, medium or low

speed and selected independently, to allow for positive

pressurization if desired. The ERV cassette including parts and

media shall include 5year warranty subject to terms and conditions

of Bard’s warranty.

The ERV thermal performance shall be certified by the manufacturer

in accordance with ASHRAE Standard 84, Method of Testing Air-to

Air Heat Exchangers and ARI Standard 1060, Rating for Air-to-Air

Energy Recovery Ventilation Equipment Cassettes, and shall be

listed in the ARI Certified Products. Unit complies with

ANSI/ASHRAE Standard 62.1 Ventilation for Acceptable Air Quality.

5.0 FILTER OPTIONS - (Select One)

F1915 (2012 04) Page 5 of 6

5.12” Fiberglass – Pleated – MERV 8

6.0 HOT GAS REHEAT- (Factory installed option)

6.1 The dehumidification circuit incorporates an independent heat

exchanger coil in the supply air stream in addition to the standard

evaporator coil. This coil reheats the supply air after it passes over

the cooling coil, and is sized to nominally match the sensible cooling

capacity of the evaporator coil. Extended run times in

dehumidification mode can be achieved using waste heat from the

refrigeration cycle to achieve the reheat process, while at the same

time large amounts of moisture can be extracted from the passing air

stream.

7.0 CABINET COLOR – (Select One)

7.1 Washable Vinyl- Two-Tone Finish with Slate front and platinum sides

7.2 Slate Gray

7.3 Beige

9.0 CONTROLS – (Select one of the following factory mounted

control options)

9.1 None

9.2 Electronic non-programmable, manual changeover

9.3 Electronic programmable, auto changeover

9.4 Electronic programmable, auto changeover, with dehumidistat

9.5 Electronic non-programmable, auto changeover, with humidistat

10.0 ACCESSORIES

10.1 WALL SLEEVE

Wall sleeve shall be factory supplied and must be constructed of 16

gauge-galvanized steel, coated with an epoxy primer and baked-on

polyester enamel paint. It shall be designed to withstand a minimum

of 1000 hours of salt spray protection when tested per ASTM B117-03

standard. One sleeve size fits all models. Sleeve only required when

a ventilation option is selected.

10.2 Exterior Louver

Furnish factory louver designed for condenser air and outside air

F1915 (2012 04) Page 6 of 6

intake and exhaust. Louver shall have a powder coat finish.

See our color chart for color selections. Louver required with sleeve

with the use of any ventilation option.

10.4 AIR DISTRIBUTION – (Select 1)

10.3.1 The Q-Tec shall have a discharge air plenum with

double deflection register mounted on front.

10.3.2 The Q-Tec shall have a discharge air plenum with

double deflection supply register on the front and both

sides.

10.3.3 The Q-Tec shall be ducted with a cabinet extension to

cover ductwork

11.0 WARRANTY

11.1 The Bard product specified shall be free from defects in materials

and workmanship for a period of 5 years for compressor, and for a

period of 5 years for all parts. Warranty period shall start from date

of installation as stated on warranty card; or from date of shipment if

no warranty card is returned to Bard Manufacturing. Equipment

must be used under normal conditions and warranty is subject to

Bard Manufacturing’s standard limited warranty statement.

12.0 INSTALLATION

12.1 Installation shall be done in strict adherence to Bard’s Installation

Instructions.

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