Technical data
6. INSTALL THE UNIT (CONT’D)
6.12 LOW TEMPERATURE APPLICATIONS BELOW FREEZING (32°F OR 0°C)
ALL MODELS
FOR GSHH3K HEAT RECOVERY AND GSEH3K ENERGY RECOVERY MODELS ONLY
GENERAL:
• Insulate the cabinet body using a 2” thick blanket insulation or by placing the unit in an insulated enclosure formed from 2” thick
fiberglass insulation board.
• Make sure that all ductwork is insulated.
• Carefully seal all of the unit ports with duct tape to prevent air leakage.
• Install a heating cable along the drain line for freeze protection.
- Use a UL listed heat tape in accordance to the manufacturer’s instruction.
- Because of the additional weight of the heating tape on drain line, secure the plastic tubing to each drain fitting using hose clamps
(not provided).
- Make sure the heat tape is rated between 3 to 6 watts per foot at 120 V.
- Protect the circuit the heat tape is connected to with a ground-fault circuit breaker.
- Cover the drain line and heating cable with 1/2 inch thick insulation.
- If you need to extend the drain line beyond the 9 foot length supplied with the unit, use copper pipe.
6.12.1 BLANKET INSULATION
If fabricating an insulation blanket, use a 2” thick hot
water heater blanket cut as shown.
Wrap the unit as shown. Make sure that all joints are fully sealed to prevent cold air penetration between the insulation and the unit.
NOTES: 1. Holes must be done in the insulation blanket
to allow drain line installation for model
GSHH3K only.
2. MAKE SURE to use excess insulation to
cover the top of unit and its ports.
CAUTION
When the ambient temperature surrounding the unit falls below freezing (32°F or 0°C), all units must run continuously to
prevent condensation.
CAUTION
• When installing an GSHH3K HEPA Filtration, Fresh Air and Heat Recovery model, make sure the unit cabinet and its drain
line are protected from freezing.
• When installing an GSHH3K HEPA Filtration, Fresh Air and Heat Recovery model, install a drip pan if required by local code.
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48
24
27
27
19
5
8
20
1
8
17
1
2
17
1
2
23
3
4
58
3
4
Bend UP 90
0
Bend UP 90
0
Bend UP 90
0
Rectangular
Door
Insulation
T-Shaped
Cabinet
Insulation
Wrap
2
1
2
Cut slots
inches
24
VR0001A
VR0002
1 2
3
Heat
tape around
drain