Carrier Aquazone 50QE900 Installation And Operating Instructions

Installation and Operating Instructions
IMPORTANT: Read entire instructions before starting
the installation.
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Fol-
low all local electrical codes during installation. All wiring
must conform to local and national electrical codes. Improper
wiring or installation may damage thermostat.
Recognize safety information. This is the safety alert sym-
bol . When the safety alert symbol is present on equipment
or in the instruction manual, be alert to the potential for person-
al injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result
in severe personal injury or death. WARNING signifies a haz-
ard which could result in personal injury or death. CAUTION
is used to identify unsafe practices which would result in minor
personal injury or property damage.
GENERAL
The commercial, non-programmable thermostats are wall-
mounted, low-voltage thermostats which maintain room tem-
perature by controlling the operation of an HVAC (heating,
cooling and ventilation) system. Separate heating and cooling
set points and auto-changeover capability allow for greater
flexibility.
Batteries are not required. During power interruption the in-
ternal NEVERLOST™ memory stores configuration settings
for an unlimited time.
The thermostat can be configured to accept several different
equipment configurations, and is provided for heat pump
operation.
The temperature display range of the thermostat is 32 to
99 F (0° to 36 C).
INSTALLATION
Select Thermostat Location —
be mounted:
• approximately 5 ft from the floor
• close to or in a frequently used room, preferably on an
inside partitioning wall
• on a section of wall without pipes or ductwork
• where temperature operating limits are within 32 to
122 F (0° to 50 C)
• where humidity operating range is within 0 to 95% rela-
tive humidity, non-condensing
The thermostat should NOT be mounted:
• close to a window, on an outside wall, or next to a door
leading to the outside
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1 4
Tab 5a 5a
Aquazone™ Water Source Heat Pump
Commercial Non-Programmable Thermostat
Part Number 50QE900-NPWS
The thermostat should
Catalog No. 535-00107 Printed in U.S.A.
• where exposed to direct light and heat from a lamp, the
sun, a fireplace, or any other temperature-radiating
object which may cause a false reading
• close to or in direct airflow from supply registers or
return-air grilles
• in areas with poor air circulation (such as behind a door
or in an alcove)
Install Thermostat
Before installing thermostat, turn off all power to the unit.
There may be more than one power disconnect. Electrical
shock can cause injury or death.
1. Turn off all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall.
b. Disconnect wires from existing thermostat. Do not
allow wires to fall back into the wall. As each wire
is disconnected, record wire color and terminal
connection.
c. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and must be
disposed of properly.
3. Remove the thermostat cover from wall plate (mounting
base) to expose mounting holes. See Fig. 1.
4. Route thermostat wires through large hole in mount-
ing base. Remove outer sheath from wires for added flex-
ibility. Standard solid or multi-conductor thermostat wire
should be used from the thermostat to the unit. Size and
length considerations are as follows: for a maximum
distance from unit of 36 ft, use 22 AWG (American
Wire Gage) wire; for a maximum distance from unit
of 100 ft, use 18 AWG wire.
3 1/8"
MOUNTING
HOLE
B
O
R G Y1 W2 W1 Y2
3 1/8"
HOLE FOR
WIRING
Fig. 1 — Thermostat Mounting and Wiring
Form 50QE-6SI Pg 1
50QE900
1"
WIRING
TERMINAL
BLOCK
C
MOUNTING
HOLE
1107 6-03 Replaces: New