Specifications
ClimateMaster Water-Source Heating and Cooling Systems
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility Vertical Stack (TRM) Series
Rev.: 05/23/07D
TRM
52
a. Removable thermostat connector.
b. Night setback control.
c. Random start on return from night setback.
d. Minimized reversing valve operation (Unit control logic shall only switch the reversing valve when cooling is demanded for
the fi rst time. The reversing valve shall be held in this position until the fi rst call for heating, ensuring quiet operation and
increased valve life.).
e. Override temperature control with 2-hour (adjustable) timer for room occupant to override setback temperature at
the thermostat.
f. Dry contact night setback output for digital night setback thermostats.
g. Ability to work with heat pump or heat/cool (Y, W) type thermostats.
h. Ability to work with heat pump thermostats using O or B reversing valve control.
i. Emergency shutdown contacts.
j. Boilerless system heat control at low loop water temperature.
k. Ability to allow up to 3 units to be controlled by one thermostat.
l. Relay to operate an external damper.
m. Ability to automatically change fan speed from multistage thermostat.
n. Relay to start system pump.
o. 75 VA control transformer. Control transformer shall have load side short circuit and overload protection via a built in
circuit breaker.
Remote Service Sentinel (CXM/DXM):
Solid state control system shall communicate with thermostat to display (at the thermostat) the unit status, fault status, and
specifi c fault condition, as well as retrieve previously stored fault that caused unit shutdown. The Remote Service Sentinel allows
building maintenance personnel or service personnel to diagnose unit from the wall thermostat. The control board shall provide a
signal to the thermostat fault light, indicating a lockout. Upon cycling the G (fan) input 3 times within a 60 second time period, the
fault light shall display the specifi c code as indicated by a sequence of fl ashes. A detailed fl ashing code shall be provided at the
thermostat LED to display unit status and specifi c fault status such as over/under voltage fault, high pressure fault, low pressure
fault, low water temperature fault, condensate overfl ow fault, etc. Units that do not provide this remote service sentinel shall
not be acceptable.
Option: Lonworks interface system
Units shall have all the features listed above (either CXM or DXM) and the control board will be supplied with a LONWORKS
interface board, which is LONMark certifi ed. This will permit all units to be daisy chained via a 2-wire twisted pair shielded cable.
The following points must be available at a central or remote computer location:
a. Space temperature
b. Leaving water temperature
c. Discharge air temperature
d. Command of space temperature setpoint
e. Cooling status
f. Heating status
g. Low temperature sensor alarm
h. Low pressure sensor alarm
i. High pressure switch alarm
j. Condensate sensor alarm
k. Hi/low voltage alarm
l. Fan “ON/AUTO” position of space thermostat as specifi ed above
m. Unoccupied / occupied command
n. Cooling command
o. Heating command
p. Fan “ON / AUTO” command
q. Fault reset command
r. Itemized fault code revealing reason for specifi c shutdown fault (any one of 7)
This option also provides the upgraded 75VA control transformer with load side short circuit and overload protection via a built in
circuit breaker.
Option: MPC (Multiple Protocol Control) interface system
Units shall have all the features listed above (either CXM or DXM) and the control board will be supplied with a Multiple Protocol
interface board. Available protocols are BACnet MS/TP, Modbus, or Johnson Controls N2. The choice of protocol shall be fi eld
selectable/changeable via the use of a simple selector switch. Protocol selection shall not require any additional programming or
special external hardware or software tools. This will permit all units to be daisy chain connected by a 2-wire twisted pair shielded
cable. The following points must be available at a central or remote computer location: