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Heat Controller, Inc. INSTALLATION INSTRUCTIONS HDG Series Air Handler
18
8.0 REFRIGERANT CONNECTIONS
Keep the coil connections sealed until refrigerant connections are made. See the Installation Instructions
for the outdoor unit for details on line sizing, tubing installation, and charging information.
Coil is shipped with “No charge”. Evacuate the system before charging with refrigerant.
Install refrigerant tubing so that it does not block service access to the front of the unit.
Nitrogen should ow through the refrigerant lines while brazing.
Use a brazing shield to protect the cabinet’s paint and a wet rag to protect the rubber grommet from be-
ing damaged by torch ames. After the refrigerant connections are made, seal the gap around the con-
nections with pressure sensitive gasket.
8.1 CONDENSATE DRAIN TUBING
Consult local codes for specic requirements.
IMPORTANT:
1. When making drain tting connections to the drain pan, use a thin layer of Teon paste, silicone
or Teon tape and install, hand tighten.
2. When making drain tting connections to drain pan, do not overtighten. Over tightening ttings
can split pipe connetions on the drain pan.
• Install drain lines so they do not block service access to front of the unit. Minimum clearance of 24
inches is required for lter, coil or blower removal and service access.
• Make sure unit is level or pitched slightly toward primary drain connection so that water will drain
completely from the pan. (See Fig. 5)
• Do not reduce drain line size less than connection size provided on condensate drain pan.
• All drain lines must be pitched downward away from the unit a minimum of 1/8” per foot of line to
ensure proper drainage.
• Do not connect condensate drain line to a closed or open sewer pipe. Run condensate to an open
drain or run line to a safe outdoor area.
CONDENSATE DRAIN TRAP
DO NOT OVERTIGHTEN DRAIN FITTING
TOWARD DRAIN CONNECTION
UNIT MUST BE SLIGHTLY INCLINED
Fig. 5 CONDENSATE DRAIN TRAP
3"
3"
UNIT
TO APPROVED DRAIN
DO NOT OPERATE UNIT WITHOUT
CONDENSATE DRAIN TRAP.