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Fig. 03 - P-Trap, Secondary Drain Pan
Module RCM-I
RCM-I Installation
P - Trap
The condensate drain
must have a minimum 3” P-Trap
installed
(Fig. 03), and run at a slope of ¼” per foot in the
direction of the drain. All RCM-I modules come with a ¾” male
CPVC primary outlet and a ¾” secondary outlet. When installing
the P-Trap it must be installed on the primary outlet. It is good
practice to install a tee and a cap right above the P-Trap to act as
a clean out, in the event of the drain line being plugged. If a vent
is to be installed, it must be on the drain side of the P-Trap, and
must comply with all local building code requirements. If code
requires a secondary drain line, run the secondary line using the
same method. Otherwise, having it drain into a secondary drain
pan is acceptable. If the coil is located above a finished area,
a secondary drain pan must
be installed. An equipment
stand/riser or rubber equipment mat may be necessary to
elevate the module off of the ground to allow for the P-Trap.
Piping the RCM-I
Only refrigerant grade pipe and fittings are to be used with
the RCM-I Module. Plumbing fittings may contain wax or other
contaminants which are detrimental to the proper operation of
the system. Insulate the suction line with a minumum of 3/8”
insulation. For inverter heat pump applications, insulating both
suction and liquid lines is mandatory. In high heat areas, a
minimum of 1/2” insulation may be needed. Support the pipe
every 5 feet, or whatever local code states.
Run the pipes in the most direct route possible, taking into
account structural integrity, building details and local building
codes. Minimum refrigerant pipe length is 16ft (6m). If going less
than 16 ft, coil the additional copper pipe up in horizontal loops
to ensure proper oil return. If the evaporator is located above
the condenser, slope any horizontal runs toward the condenser.
If the condenser is located above the evaporator, a P-trap must
be installed at the bottom of the vertical riser. For long vertical
risers, additional P-traps must be installed for every twenty feet.
Lines running over 213’ (65m) are not recommended.
Pipe Sizing
Refer to charts below and Module HVS - Variable Speed Heat
Pump Manual for pipe sizing.
The HVS Variable Speed Heat Pump comes with a factory charge. Additional charge will only be needed on line sets
longer than 49 ft. (See Table 02 below)
Model
Liquid Line
Suction Line
Maximum Length
Maximum Lift
HVS-36
3/8”
(9.5 mm)
5/8”
(15.9 mm)
213.25’
(65 m)
98.4’
(30 m)
HVS-60
3/8”
(9.5 mm)
3/4”
(19 mm)
213.25’
(65 m)
98.4’
(30 m)
Table 01 - Minimum pipe sizes, maximum length and maximum lift
Model
Liquid Line
Suction Line
Factory Charge (kg)
Add extra refrigerant
for line sets
over 49 ft (15 m)
HVS-36
3/8”
(9.5 mm)
5/8”
(15.9 mm)
6.75 lbs
(3.06 kg)
1 oz/ 3.3 ft
HVS-60
3/8”
(9.5 mm)
3/4”
(19 mm)
10.15 lbs
(4.6 kg)
1 oz/ 3.3 ft
Table 02 - Minimum pipe sizes (up to 98’), factory charge and additional refrigerant required
Pipe Sizing
Vent
P-Trap
Secondary
Drain
Primary
Drain
Clean
Out
Secondary Drain Pan
Important: Return Air must
be filtered
before entering the cooling module.
Module RCM-I - RCM-I Coil Installation (3/8)
