McQuay FCVC, Руководство по установке и обслуживанию

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IM 1089 - Field Installation of MT155 Thermostats
General
Installation
Please refer to Fig. 1, 2, 3 and 4
Two-pipe system (Cooling or Heating)
To field wire a T*155 thermostat (either as wall-mounted or
unit-mounted) and field-install valve package for a 2-pipe
system the following accessories are required:
• Single-Pole Double-Throw Automatic Changeover
Switch (SPDT ACO Kit P/N 039398600)
• Thermostat TA155 (kit) – PN 107345302 or
Thermostat TB155 (kit) – PN 107345304
• 10K Return Air Sensor - PN 107345501
Step 1: Installing NC (Normally Closed)
valve packages
• Solder the appropriate inlet and outlet pipe connections from
the valve package to the coil connections.
• Snap-on the SPDT ACO Switch on the supply side of the
valve package (SPDT ACO Kit P/N 039398600 to be
ordered as field-installed option)
• Cut white wire 60 of the wiring harness leading from the
Low Voltage Interface Board terminal connection (see Fig.
1) prior to attaching the quick-connect connector of the On-
Off valve actuator to the interface board (Fig. 3). The white
wire lead going to the actuator will be connected to terminal
No. 1 of the ACO switch (see Fig. 5):
• Terminal No. 1: black wire - to be connected to the valve
side (G terminal) with white wire of the terminal strip
• Terminal No. 2: red wire – to be connected to the red
wire (TB3-1) of the thermostat
• Terminal No. 3: blue wire – to be connected to the blue
wire (TB3-2) of the thermostat
Figure 1: Automatic changeover connection between the
valve actuator and the interface board
Step 2: Provide power to thermostat
(refer to Fig. 2 and 4)
• Connect a wire from thermostat terminal TB1- 4 (L2
Neutral) to the common terminal on Low Voltage Interface
Board (terminal C )
• Connect a wire from thermostat terminal TB2- 1 (24VAC) to
the 24 V terminal connection R.
• Connect fan speed wires from the thermostat to appropriate
Low Voltage Interface Board terminals:
• Connect a wire from thermostat terminal TB2- 2
( High fan speed) to the HI terminal
• Connect a wire from thermostat terminal TB2- 3
( Med fan speed) to the Med terminal
Installation and Maintenance Manual IM 1089
Field installation of Thermostat (MTA155 or MTB155) and
24V valve packages on Vertical Thinline 3G fan coil units
with factory-installed Low Voltage Interface Board Group: Applied Air Systems
Part Number: IM 1089
Date: October 2010
DANGER
READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
THERMOSTAT.
Failure to observe safety information and comply with
instructions could result in PERSONAL INJURY, DEATH
AND/ OR PROPERTY DAMAGE.
To avoid electrical shock or damage to equipment, disconnect
power before installing or servicing. Use only wiring with
insulation rated for full thermostat operating voltage. Use
copper wire only. Insulate or wire-nut all un-used leads. Any
wiring, including the remote probe, may carry the full operating
voltage of the thermostat.
To avoid potential fire and/ or explosion do not use in
potentially flammable or explosive atmospheres.
Retain these instructions for future reference. You must review
your application and national and local codes to ensure that
your installation will be functional and safe.
CAUTION
Care should be used to avoid electrostatic discharge to the
microprocessor.
This unit has configuration dip switches and jumpers. You may
need to reconfigure the thermostat for your application.
G0
to TB3 - 1
of T-stat
to TB3 - 2
of T-stat
RED
BLUE
WHITE 60
WHITE 61
WHITE 62
BLACK WHITE
ACO CLG
+
CLG
–
COM
Wiring Harness
Valve
Acuator
LV
Board
Cap the
wire