McQuay WGTH User Manual

SmartSource™ Two-Stage Horizontal Water Source Heat Pumps

SmartSource™ two-stage water source heat pumps are developed using state of the art technology and design techniques, resulting in products with the highest part load efficiencies. These units typically operate at low compression and low fan speeds the majority of the time, for higher energy savings, quieter operation, and precise temperature and humidity control, providing unmatched comfort. High EERs that far exceed ASHRAE 90.1 standards make these units perfect for LEED projects and rebate opportunities. All units are available geothermal-ready from the factory with many features to easily match your application requirements.

1. ECM Fan Motor: 4 field adjustable cfm settings and 28

programmed cfm values provide a wide range of airflow selections for quieter operation and lower energy consumption.

2. Copeland UltraTech Two-Stage Compressor: available

in a variety of commercial voltages, mounted on a double isolation system for reduced sound and vibration.

3. Refrigerant Circuit: Utilizes R-410A refrigerant with a bi-

flow thermal expansion valve for easy metering and four way solenoid reversing valve.

4. MicroTech III Controls: Easy open-protocol integration

with optional LonWorks® or BACnet®.

5. Unit Status LED: Instant visuals on unit operation for

easy troubleshooting and advanced diagnostics.

6. 4-Sides Filter Rack with Standard 2” or Optional 4” Filters: Designed for easy filter maintenance. MERV 8 &

13 filter options with gasketed filter rack meet LEED-NC EQc5 applications with a leakage rate less than 4 CFM per square foot of filter area at 0.5”ESP.

7. Stainless Steel Drain Plan: sloped with lipless drain con-

nection for positive condensate flow, meets ASHRAE 62.1 Section 5.11.

8. Flush Mounted Fittings: Easy one-wrench connection,

securely fastened to the cabinet corner posts.

9. Blower and Motor Orifice Ring: Easy service removal

without having to remove the blower housing or disconnecting the unit from the duct work.

10. Durable Cabinet Construction: Heavy gauge steel with

powder coated textured paint, lined with cleanable, foilfaced insulation on the airside..

Performance Data

Unit Size Stage CFM GPM

026

032

038

044

049

064

072

Water Loop (Boiler Tower) Ground Loop (Geothermal)

Cooling Heating Cooling Heating

Btu/hr EER Btu/hr COP Btu/hr EER Btu/hr COP

Stage 1 700 6.5 19,800 20.2 21,800 6.4 22,200 29.7 15,100 4.5

Stage 2 800 6.5 26,400 18.0 29,300 5.7 27,600 20.7 18,100 4.1

Stage 1 875 7.5 24,700 18.5 27,800 6.0 33,800 25.9 19,800 4.5

Stage 2 1,000 7.5 32,500 16.5 36,400 5.3 33,800 18.9 23,700 4.1

Stage 1 1,100 9.0 28,300 20.2 32,600 6.4 30,500 28.8 22,500 4.6

Stage 2 1,250 9.0 39,000 17.6 44,400 5.6 40,200 20.1 28,100 4.2

Stage 1 1,225 10.5 32,900 19.7 36,600 6.0 35,500 28.3 25,600 4.3

Stage 2 1,400 10.5 44,400 17.3 50,100 5.4 45,900 19.8 31,700 4.0

Stage 1 1,400 12.2 36,900 19.5 40,800 6.0 39,600 28.2 29,200 4.4

Stage 2 1,600 12.2 48,900 16.7 55,300 5.3 50,600 19.2 35,900 4.0

Stage 1 1,750 16.0 48,200 19.6 53,800 5.8 52,200 27.9 38,300 4.3

Stage 2 2,000 16.0 64,800 17.4 76,100 5.2 67,100 19.7 47,000 3.9

Stage 1 1,920 17.5 56,400 18.4 64,600 5.4 60,700 26.1 46,200 4.1

Stage 2 2,160 17.5 72,700 15.9 88,400 5.0 75,300 18.1 55,200 3.7

Many Factory-Mounted Options and Accessories

Four Unique Dehumidification Options:

• SmartDehumidification– Uses hot gas reheat, humidi-

stat, 2-stage thermostat & smart air flow management for precise humidity control.

• SimplifiedDehumidification– Uses a 3-stage thermo-

stat to optimize unit capacity and fan speed for maximum latent capacity while decreasing room humidity levels.

• HumidistatControlledDehumidification– Uses a hu-

1. Hot Gas Reheat 3. Field Adjustment of ECM Fan

2. Loop Circulating Pumps Motor

4. Waterside Economizer

Dimensions in inches (mm)

Unit Size

026, 032 22.40" (569) 63.30" (1608) 19.30" (490)

038 25.00" (635) 73.00" (1854) 21.30" (541)

044, 049 25.00" (635) 78.40" (1991) 21.30" (541)

064, 072 25.00" (635) 83.80" (2129) 21.30" (541)

Overall Cabinet Dimensions in inches (mm)

W L H

midistat and 2-stage thermostat to control room humidity levels.

• DehumidificationOnly– Uses a humidistat in cooling

only mode.

Waterside Economizer - Reduces compressor energy con-

sumption by using a cold water coil for cooling under suitable conditions.

LoopPumps– Convenient factory mounted pumps with flow

and head capabilities for most geothermal applications.

5,10,15&20kWElectricHeat– For alternate heat source

with controls for primary, supplemental, boilerless or emergency heat. (Available as a field-installed duct heater kit)

Non-FusedDisconnectOption– Convenient Power shut-off

and lockout at the unit.

Extended Range Coaxial Heat Exchanger Coil and Piping

Insulation– for geothermal application. InsulationOptions– Foil faced, closed cell or 1/2” standard

fiberglass options for the air and compressor side of the unit.

EpoxyCoatedCoils– For extra corrosion protection to meet

ASTM B-11 3000 hour salt spray test.

DeluxeSoundPackage– Reduces sound levels for quieter

operation.

5-YearExtendedPartsWarrantyAvailable

Voltages

Unit Size

026-032

038-072

Horizontal Unit

Volts Hz Phase

208-230 60 1

265 60 1

208-230 60 3

460 60 3

208-230 60 1

208-230 60 3

460 60 3