Amtrol PREMIER SERIES Benutzerhandbuch

PREMIER™ SERIES

APPLICATION GUIDE

This booklet is not to be used as an installation manual. Detailed instructions are available at www.amtrol.com

Applications Include:

Radiant Heating

Snowmelt Systems

Solar Panel Input

Wood Boilers

Pool & Spa Heating

Twin Coil Input for Commercial

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1. An indirect-fired heater with the

top coil extracting heat for radiant

or snowmelt systems. Acts as a

combination buffer tank/indirect

water heater.

2. An indirect-fired heater with the top

coil connected to a supplemental

heat source such as solar, wood

boiler or heat recovery.

3. A commercial indirect setup where

both coils are powered by a large

boiler, providing excellent recovery.

General Overview

The Premier™DC Series is a multipurpose indirect-fired water heater suitable for many uses.

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Product & Benefits

The Dual Coil reduces equipment costs and installation time while saving space by combining multiple hydronic

system components into one unit. Figure 1 shows how boiler cycling is reduced in radiant heating applications to

increase efficiency.

By combining two high capacity heat exchangers in a single unit, the domestic water temperature can provide reliable

control of radiant supply temperatures. Double wall heat exchangers are also readily available for systems using

antifreeze solutions where required by code.

This setup simplifies installation and eliminates the need to purchase expensive heat exchangers and mixing valves.

Boiler cycling is reduced by the domestic water mass, performing the same function as a buffer tank.

Figure 1 Radiant Zone with Domestic Water Controlling Supply Temperature

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Figure 2

DC-80 / DC-80DW

*Double wall models maximum 360,000 BTUH with both coils.

DC-120/DC-120DW

BOILER FIRST–HOUR CONTINUOUS

OUTPUT RATING FLOW

(90ºF rise) (70ºF rise

BTU/HR GALLONS steady state)

GPH

80,000

209 139

100,000

236 173

120,000

263 208

140,000 289 242

160,000 316 277

180,000

343 312

200,000

370 346

240,000

423 413

280,000

477 482

320,000

530 551

*360,000 584 620

400,000 637 688

BOILER FIRST–HOUR CONTINUOUS

OUTPUT RATING FLOW

(90ºF rise) (70ºF rise

BTU/HR GALLONS steady state)

GPH

80,000

117 139

100,000

202 173

120,000

229 208

140,000 256 242

160,000 283 277

180,000

310 312

200,000

337 346

240,000

389 413

280,000

443 482

320,000

469 551

*360,000 550 620

400,000 603 688

Domestic Water Performance

Bottom Coil OnlyBoth Coils as Input

Product & Benefits (Con’t)

Commercial applications require rapid recovery to meet high demands. These sites also have large boilers to

accommodate the building(s) heating load. When both coils are utilized to heat domestic water, Premier™DC Series

have a heat transfer capability far in excess of traditional single-coil and tank-in-tank indirects. The resulting performance

can allow competitive bids by using fewer heaters than the competition (Figure 2).

Example: 80 Apartment units

700,000 BTUH domestic hot water demand

2-3GPM showerhead

2-3 person occupancy

NOTE: THESE FIGURES WERE OBTAINED USING 180°F BOILER WATER AT FLOWS OF APPROXIMATELY

15 GPM TOTAL FOR BOTH HEAT EXCHANGERS. UNLIKE MOST INDIRECTS, EXTREME BOILER TEMPS AND

EXOTIC CIRCULATOR PUMPS ARE NOT REQUIRED TO ACHIEVE THESE NUMBERS.

Dual Coil Units Can Reduce the Number of Hot Water Makers Required

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Figure 3

Figure 4

Unique exchanger placement and

ease of service are two major benefits

of the Premier™DC Series. Amtrol®

is the only company utilizing a tank

design that allows two removable

heat exchangers to be arranged at

opposite ends of the tank. (Figure 3)

This column arrangement promotes

instant transfer of heat into the top

coil during a radiant heating call, and

provides a full-length heat exchanger

when both coils are powered for

indirect water heating. (Figure 4)

A heavy, molded plastic jacket

resists dents, scratches and harsh

commercial environments. A 2-part

expanding urethane foam is injected

into the jacket cavity, providing

superior insulation when compared to

standard fiberglass wraps. Standby

loss is less than 0.4°F/hour.

Product & Benefits (Con’t)

Dual Coil Design

Dual Coil Operation

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Radiant and Snowmelt Applications

1. Determine the heat load for the application

2. Determine the supply temperature and flow for your system

3. Using the charts below, determine what domestic temperature and top coil flow combination will

satisfy the space heat demand.

4. Choose either the DC-80 or DC-120 based on the domestic hot water load. Specify double-wall

heat exchanger if required by code.

Example: Radiant loop for large addition

80-gallon unit selected to handle large bathtub

120°F desired supply temp

45,000 BTU anticipated heat load

In this example, a domestic water setting of approximately 138°F will provide a

consistent 120°F output at 4GPM.

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With both coils powered, the DC Series models have first-hour ratings up to 637 gallons at a 90°F domestic temperature

rise. See the following charts for sizing:

Commercial Use as Indirect Heater

MBH = BTU output in 1000’s DHW = Domestic Hot Water

APARTMENT SIZING

Model DC-80 PUMP SELECTION BOILER SELECTION

Units Heaters Coil Flow (GPM)

Total for Both Coils

FT/Head

(Use Parallel Plumbing)

MBH Available for DHW

with Maximum # of Units

2-16 1 15 18 400

17-54 2 30 18 800

55-89 3 45 18 1200

90-124 4 60 18 1600

125-160 5 75 18 2000

HOTEL SIZING

Model DC-80 PUMP SELECTION BOILER SELECTION

Rooms Heaters Coil Flow (GPM)

Total for Both Coils

FT/Head

(Use Parallel Plumbing)

MBH Available for DHW

with Maximum # of Units

2-19 1 15 18 400

20-65 2 30 18 800

66-108 3 45 18 1200

109-155 4 60 18 1600

156-200 5 75 18 2000

APARTMENT SIZING

Model DC-120 PUMP SELECTION BOILER SELECTION

Units Heaters Coil Flow (GPM)

Total for Both Coils

FT/Head

(Use Parallel Plumbing)

MBH Available for DHW

with Maximum # of Units

2-21 1 15 18 400

22-82 2 30 18 800

83-138 3 45 18 1200

139-197 4 60 18 1600

198-260 5 75 18 2000

HOTEL SIZING

Model DC-120 PUMP SELECTION BOILER SELECTION

Rooms Heaters Coil Flow (GPM)

Total for Both Coils

FT/Head

(Use Parallel Plumbing)

MBH Available for DHW

with Maximum # of Units

2-24 1 15 18 400

25-95 2 30 18 800

96-162 3 45 18 1200

163-232 4 60 18 1600

233-300 5 75 18 2000

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Installation

The following diagrams depict general piping schemes for various applications. These diagrams are for

reference only and should not be used as a detailed piping schematic.

1. Radiant with domestic temp controlling supply temp. Simple and cost-effective Differential controlled to

with 15°F with heating load only

2. Mixing valve used for applications with multiple temp requirements or greatly fluctuating system flow rates

3. Injection pump used for maximum pump efficiency and precise temperature control

4. Backup or wood boiler as supplement via top coil

5. Solar input to top coil

6. Commercial application with both coils powered by large boiler

Radiant Zone with Domestic Water Controlling Supply Temperature

Radiant with Mixing Valve

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Installation (Con’t)

Radiant Zone with Variable Speed Pump

Input with Dual Boilers (Wood Boiler Shown)

*Do not circulate when boiler is cold.

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Installation (Con’t)

Dual Input with Solar Collectors

Both Coils as Input

(Reverse Return Piping)

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