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Carrier 50QE900-NPWS Aquazone Owner's Manual
Carrier 50QE900-NPWS Aquazone Owner's Manual

Carrier 50QE900-NPWS Aquazone Owner's Manual

Water source heat pump commercial non-programmable thermostat
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GENERAL
The Aquazone commercial, non-programmable thermostats
are wall-mounted, low-voltage thermostats which maintain
room temperature by controlling the operation of an HVAC
(heating, cooling and ventilation) system. Separate heating and
cooling set points and auto-changeover capability allow ther-
mostat flexibility.
Batteries are not required. During power interruption the
internal NEVERLOST™ memory stores configuration settings
for an unlimited time.
CONFIGURATION
Thermostat Display —
ed in the center of the thermostat. See Fig. 1. The following
information can be displayed on the screen:
• mode (OFF, HEAT, COOL, or AUTO)
• fan setting (FAN ICON or blank)
• room temperature
• desired temperature
• setup indicator
• lock indicator
Heat or Cool Indicator —
located on the bottom middle cover of the thermostat. See
Fig. 2. The light will be red if the thermostat is in Heating
mode. The light will be green if the thermostat is in Cooling
mode.
Thermostat Front Panel Buttons —
stat has buttons on the front cover which are used to raise or
lower the desired set point and change the current mode. See
Fig. 2.
SET POINT BUTTONS — The UP ARROW and DOWN
ARROW buttons will raise or lower the current desired tem-
perature set point. If the thermostat is in AUTO mode, pressing
the UP ARROW or DOWN ARROW button will adjust both
the heating and cooling set points. Pressing the UP ARROW or
DOWN ARROW button in Cooling mode will adjust only the
cooling set points. Pressing the UP ARROW or DOWN
ARROW button in Heating mode will adjust only the heating
set points.
FAN BUTTON — The fan button determines fan operation.
Pressing the fan button causes the fan setting icon (
displayed. When the fan setting icon is displayed, the fan will
run continuously. If the fan setting icon is not displayed, the fan
will run during heating and cooling operation only.
KEYPAD LOCK — The thermostat has a keypad lockout fea-
ture which will not acknowledge front panel buttons until the
lockout sequence is entered. To disable or lock the keypad,
press and hold the Mode button. While holding down the Mode
button, press the UP and DOWN ARROW buttons simulta-
neously. The Locked icon (
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
Owner's Manual
Part Number 50QE900-NPWS
The thermostat display is locat-
A Heat or Cool indicator is
The thermo-
) to be
) will appear on the display.
Catalog No. 535-00112
Printed in U.S.A.
The thermostat is unlocked by performing the same proce-
dure. Press and hold the Mode button. While holding down the
Mode button, press the UP and DOWN ARROW buttons si-
multaneously. The Locked icon will be removed from the dis-
play.
MODE BUTTON OPERATION — The Mode button se-
lects the operating mode of the thermostat. If OFF is selected,
the thermostat will not enter Heating or Cooling mode. If
HEAT is selected, the thermostat will only enter Heating mode
(if the room temperature is below the heating set point). If
COOL is selected, the thermostat will only enter Cooling mode
(if the room temperature is above the cooling set point). If
AUTO is selected, the thermostat will enter Heating or Cooling
mode based on the room temperature and the heating and cool-
ing set points.
SETUP
INDICATOR
Setup
SYSTEM
OFFON
STATUS
ROOM
TEMPERATURE
FAN
INDICATOR
LOCKED
INDICATOR
Fig. 1 — Thermostat Display
OFFON
DISPLAY
SCREEN
MODE
FAN
INDICATOR
BUTTON
BUTTON
LIGHT
Fig. 2 — Thermostat Front Cover
Form 50QE-5SO
Pg 1
50QE900
COOLING
SET POINT
°
COOLING MODE
INDICATOR
AUTO MODE
AUTO
INDICATOR
HEATING MODE
INDICATOR
HEATING
SET POINT
Setup
°
AUTO
DOWN
UP
ARROW
ARROW
BUTTON
BUTTON
6-03
Replaces: New

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Summary of Contents for Carrier 50QE900-NPWS Aquazone

  • Page 1 50QE900 Aquazone™ Water Source Heat Pump Commercial Non-Programmable Thermostat Owner’s Manual Part Number 50QE900-NPWS The thermostat is unlocked by performing the same proce- GENERAL dure. Press and hold the Mode button. While holding down the The Aquazone commercial, non-programmable thermostats...
  • Page 2 Two-Stage Operation — Auto-Changeover — When the thermostat mode is set to The second stage of heat or AUTO, the thermostat will provide automatic changeover from cool is turned on when the first stage has been on for a mini- Heating to Cooling mode and Cooling to Heating mode when mum of 2 minutes and the temperature differential from the set required.
  • Page 4 Copyright 2003 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 535-00112 Printed in U.S.A. Form 50QE-5SO Pg 4 5-03 Replaces: New...