Daikin IM 986-2 VHC User Manual

Page 20 of 48 / IM 986-2
Water Connections
All piping connections should be made using good
plumbing practices and in accordance with any and all
local codes that may apply.
Unit Piping Connection
Unit sizes 009 through 018 coil connections are
gooseneck style, made of copper tubing with 1/2" FPT.
Unit sizes 021 through 036 have 3/4" FPT connections
(Figure 31).
Shutoff/Balancing Valve
Each heat pump requires a shutoff valve on both the
supply and return risers for easy serviceability and
removal of the chassis when necessary.
We suggest using a factory installed 2-way motorized
isolation valve on the return line of the chassis and a
Auto Flow Regulator (AFR) installed on the supply line
which allows proper water ow in a given size unit.
Each valve package has 1/2" FPT or 3/4" FPT threaded
connections (Figure 32).
Figure 31: Typical Motorized Valve Piping
Adding A Motorized Valve & Auto Flow
Regulator
The Vertical stack water source heat pump chassis can
be congured with a 2-way motorized valve. The 2-way
motorized valve is mounted on the return line of each
unit and the Auto Flow Regulator (AFR) is mounted to
the supply line. Valve assemblies terminate with either
a 1/2" (unit sizes 009-018) or 3/4" (unit sizes 021-036)
NPT threaded connection and will accommodate factory
supplied hoses.
Figure 29: Low Voltage Terminal Strip for Thermostat Wiring
Note: See specic thermostat installation manual
for wiring and operation of thermostat. Install wall
mounted thermostat while completing dry wall
installation.
Connect Condensate Drain Hose to Drain
Stub Out
1. Remove the two (2) screws located along the back
edge of the drain pan, holding it in place
(Figure 30).
2. Adjust the direction of the condensate drain hose
and slip it over the drain stub out. Using the
provided clamp, secure the hose by tightening the
clamp.
3. Reinstall the secondary drain pan with the two (2)
screws removed in step 1.
Figure 30: Connect Drain Hose to Drain Stub Out
FPT Supply
Connection
2-Way
Motorized
Valve
Auto Flow
Regulator
FPT Return
Connection
Two (2) Screws Holding
Pan in Place
Drain
Stub Out
Hose Clamp
Thermostat Low
Voltage Terminal Strip
2-Speed
Fan Switch

Daikin IM 986-2 VHC Specifications

General

Brand	Daikin
Model	IM 986-2 VHC
Category	Heat Pump
Language	English