Comfort-Aire HKV300A - Manual (Page 12)

Installation, Operation & Maintenance HKV SERIES Heat Controller, LLC
11
Condensate Piping - HKV
Remove knockout on side that drain will be connected. Remove
access panels. Inside of unit, untie and uncoil drain hose. Form
trap in hose, make sure hose is not kinked or deformed. Con-
nect plate assembly to side frame with 2 screws.
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line to building drain. Horizontal runs must be pitched ¼” per
foot (10 mm per 46 cm) toward drain. Do not trap externally.
Figure 4 illustrates a typical trap and vent used with HKV series
equipment.
Each unit must be installed with its own individual line to the
building main condensate drain line or riser. Provide a means
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with a common trap and or vent.
Always vent the condensate line when dirt or air can collect
in the line or a long horizontal drain line is required. Also vent
when large units are working against higher external static pres-
sure than other units connected to the same condensate main
since this may cause poor drainage for all units on the line.
WHEN A VENT IS INSTALLED IN THE DRAIN LINE, IT MUST
BE LOCATED AFTER THE TRAP IN THE DIRECTION OF THE
CONDENSATE FLOW and opening 46” (117 cm) minimum from
bottom of unit. (Vent per code)
m] drain slope
Pipe Connected Connected
Size Tons kW
3/4” [19mm] <4 <14
1” [25mm] <6 <21
1-1/4” [32mm] <30 <105
1-1/2” [38mm] <50 <175
2” [51mm] <150 <527
3” [76mm] <300 <1055
4” [102mm] <500 <1758
* Make sure all connections are secure and
water tight.
WARNING! Ensure condensate line is pitched toward
drain 1/4" per foot [10mm per 46cm] of run.
Condensate Installation
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Figure 4: HKV Typical Trap and Vent
Drain main or riser must be sized for all units connected to it.
After drain is connected to main and all drain connections are
secure and water tight, pour 1 gallon of water into condensate
pan. Water should drain out freely. Repair any leaks.
WARNING!
! !