MCQUAY Service Guide Book
Controller Configuration
31
5.5 Chilled Water Fan Coil Unit (W2.0)
The system operating modes can be configured
via the following jumpers. For each jumper
selected, the permissible operating modes are as
follows:
Jumper Configurati
on
Operating Modes
M1 2
Pipes
without Aux.
Heater
Heat>Cool>Dry>Fan
M2
2 Pipes with
Aux. Heater
Heat>Cool>Dry>Fan
M3
4 Pipes +
Boiler
Heat>Cool>Dry>Auto
>Fan
M4
4 Pipes +
Boiler
Heat>Cool>Dry>Fan
W2 Main Board
The standard W2 board comes with a VALVE
jumper. The system can be configured as the
jumper selection listed below:
Mode Application
VALVE
jumper
HEAT
jumper
Heatpump
Valve
√
√
Valve less
X
√
Cooling Only
Valve
√
X
Valve less
X
X
√
: Jumper Remained X : Jumper Removed
VALVE & HEAT Jumper Location
Model: MWM - G2W / 301W
1. VALVE jumper is plugged into JVLV
connector on the emergency switchboard.
2. HEAT jumper is plugged into JMODE
connector on the emergency switchboard.
MWM 07/10/15G2W
MWM 20/25G2W / 301W
Model: CK - AW/MWH/CW, CE - DW/CBW/EW
and CC - CW
1. VALVE jumper is plugged into JVLV
connector on the main board.
2. HEAT jumper is plugged into the OD
connector on the main board.
M1
M2
M3
M4
Heat
Jumper
Valve
Jumper
Heat
Jumper
Valve
Jumper
Heat
Jumper
Valve
Jumper
Summary of Contents for 5MDS
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