Step 5 — Connect Condensate Drain Line —
Observe all local sanitary codes when installing condensate
drains.
1. Connect drain line by inserting a
5
⁄
8
-in. rigid PVC pipe
over the drain connection. Refer to Fig. 11.
The drain tube extension must be securely fastened
to the condensate drain. Failure to do so can result
in condensate water dripping onto the floor.
2. To ensure regular flow of condensate water, the drain pipe
should be pitched toward an open drain or sump at a down-
ward slope of at least
1
⁄
4
-in. per foot. Refer to Fig. 12.
IMPORTANT: Be sure the drain piping has no slack
which might form a trap. Do not insert a trap in the
drain line; the drain is internally trapped.
3. Insulate condensate drain line(s). Insulate the condensate
drain lines that are located in or above an occupied area
with a condensate proof material such as polyurethane or
neoprene.
Table 5 — Required Piston Sizes for AccuRater Metering Device
OUTDOOR
UNIT 38
INDOOR
UNIT 40QN
INDOOR
PISTON
INDOOR
PISTON TYPE
OUTDOOR
PISTON
OUTDOOR
PISTON TYPE
REQUIRED SYSTEM
CHARGE (lb)*
HDC, HDL018
B018
49
B
N/A
N/A
4.6
HDC024
B024
57
B
N/A
N/A
5.3
BK018
H018
51
B
47
B
5.0
BK024
H024
59
B
52
B
5.1
LEGEND
N/A
— Not Applicable
TXV — Thermostatic Expansion Valve
*Charge amount determined based on 25 ft of line. Check charge for
longer lines using superheat method. See 38HDC, HDL and BK in-
stallation, start-up, and service instructions for system charging
procedures.
NOTE: The 38HDS systems do not use the AccuRater device. The
38HDS systems have a TXV in the condensing unit for refrigerant
metering and control.
NOTE: Arrow on AccuRater
T
body points in
free flow
direction away
from the coil.
Fig. 9 — AccuRater Metering Device in Liquid
Line (Bypass Type Components); Cooling
Fig. 10 — AccuRater Metering Device at Service
Valve (Bypass Type Components); Heating
Fig. 11 — Drain Connection (Right Side Shown When
Facing Fan Coil Unit)
11