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XE70 SERIES - T6372/T6373
FAN-COIL THERMOSTATS
2-PIPE FAN-COIL CONTROL

PRODUCT SPECIFICATION SHEET

The T6372 and T6373 are designed to control the valve, or the valve and the fan in 2-pipe fan-coil applications.

The thermostat operates an on/off valve to provide control at the desired setpoint temperature.

The fan can also be controlled from the thermostat.

In some cases it is wired to run continuously, and can be switched off with the system ON/OFF switch, while with other models there is a choice of running the fan continuously, or cycling it with the thermostat.

Versions are available with a manual 3-speed fan switch, and with a system on-off switch.

Heat/cool changeover operation is also possible on some versions.

This function can be accomplished either by a manually operated heat/ cool switch on the front of the thermostat or in some versions automatically by the use of a pipe thermostat on the supply water pipe of the fan-coil.

FEATURES

Dual diaphragm sensing element ensures close
temperature control for all loads and applications
Attractive modern styling makes this thermostat ideal
for locating in the occupied space, particularly in
offices or hotels
All versions have heat anticipator, which improves
temperature control in both heating and cooling
operation
Thermostat mounts directly onto a wall or conduit
box

Slide switches allow manual control of system
operation and fan speed
Auto heat/cool changeover possible (on some
versions) by using pipe thermostat
Optional extras:
- range stops F42006646-001
- tamperproof cover F42008489-001 (opaque),
F42008489-002 (transparent)

SPECIFICATIONS

MODEL	SWITCHES							FEATURES
MODEL	ON/ OFF (SPST)	3-SPEED FAN (SPTT)	FAN/ AUTO/ CONT (SPDT)	HEAT/ COOL (SPDT)	HEAT/ COOL (DPDT)	HEAT/ OFF/ COOL (DPTT)	HEAT/ FAN/ COOL (DPTT)	FIXED DEADBAND	AUTO CHANGE-OVER
T6372A1018
T6372B1024
T6372B1032
T6372C1014
T6373A1017
T6373A1157									+
T6373B1015
T6373B1064
T6373C1013

Changeover using aquastat
+ Central changeover possible for multiple units, requires central switch

Setpoint range:	10...30oC. By means of a large setpoint dial	Wiring:	Up to 8 screw-in terminals per unit, capable of accepting wires up to 1.5 mm2
Supply voltage:	230 V~, 50...60 Hz	Enclosure:	Plastic 2-piece housing
Thermostat switch:	S.P.D.T.	Dimensions:	85 x 130 x 40 mm (w x h x d).
Performance:	Typical differential 1K (heating & cooling) at 20oC at 50% load with anticipator connected	Protection class:	IP30
Electrical ratings:	4(2) A, 230 V~ Typical loads are fans, zone valves and relays	Environmental requirements:	Operating temperature range 0 to 40oC Shipping and storage temperature range -20 to 50oC Humidity range 0 to 90% rh, noncondensing
Operational life:	Greater than 100,000 cycles (all loads) for thermostat contacts at 230 V~ Greater than 6,000 operations for all manually operated switches	Approvals:	CE mark, complying with standards EN60730-1 (1995), EN55014-1 (1997), EN55014-2 (1996). Product must be wired as shown for CE compliance.
Mounting:	Mounts directly onto wall or wall-box (mounting screws supplied)

DIMENSIONS

INSTALLATION

Location
The XE70 Series thermostat is the temperature control
element in the fan-coil or air-conditioning system, and must
be located in a position with good air circulation, on an inside
wall about 1.5 m above the floor to sense the average
temperature. Do not position the thermostat in draughts,
near hot or cold air sources or where it will be affected by
radiant heat from the sun or other appliances.

Mounting the thermostat
Any XE70 Series thermostat can be directly mounted on the wall or on a conduit box (see diagram). Mounting screws are
supplied for both alternatives.

Wiring the thermostat
The standard wiring access is via a hole in the base of the
thermostat, near the top edge.

IMPORTANT

1. The installer must be a trained service engineer

2. Disconnect the power supply before beginning
installation

OPERATION

Sensing element

The thermostat sensing element comprises two circular,
flexible metal plates welded together at the rims and encapsulating a gas/liquid combination whose pressure
changes in response to variations in temperature. This dualdiaphragm expands and contracts with ambient temperature changes to operate a snap-acting switch which controls the heating or cooling circuit.

Heat anticipator

It is recommended that the heat anticipator is always
connected for both heating and cooling operation.

Switches

All switches are slide switches for ease of operation.
The ON/OFF switch is a system on/off switch, as it removes
power from the thermostat.
The FAN SPEED switch allows selection of 3 different fan
speeds, 1 (low), 2 (medium), and 3 (high) The SPDT HEAT/COOL switch allows selection of either heating or cooling operation. There is only a single output connection capable of powering a fan or a single zone valve in a 2-pipe fan-coil unit.

APPLICATION

		T6372A	T6372B	T6372B	T6372C	T6373A	T6373A	T6373B	T6373B	T6373C
Application	Ventilation		*	*	*
	2-pipe fan-coil	*	*	*	*	*	*	*	*	*
	4-pipe fan-coil
	Heatpump
	Air-conditioner
Control Capability	Heat or Cool	*				*	*
	Heat/cool		*	*	*			*	*	*
	Changeover		manual	manual	auto		central	manual	manual	auto
	Fan control (auto or cont)	a or c	a or c	a or c	a or c	cont	cont	cont	a or c	cont
	Fan speed control					*	*	*	*	*
	Valve control	*	*	*	*	*	*	*	*	*
	Compressor control

WIRING

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