TFC Group A3MID - Manual (Page 2)

INSTALLATION INSTRUCTIONS
MID-POSITION VALVE VAL322MP VAL328MP
INSTALLATION
Before fitting the valve, read through the plumbing
and wiring instructions. When replacing the valve
actuator only, set the Auto/Manual lever to the
“Manual Open” position before removal. On the
replacement actuator set the Auto/Manual lever to
“Manual Open” position before fitting.
WIRING
All wiring should be carried out to IEE Regulations
White
- Room Thermostat Call / Heating on
Grey - Cylinder Thermostat Sat / Hot water off
Orange - Cylinder Thermostat Call / Boiler and Pump
Blue - Neutral
Green & Yellow - Earth
PLUMBING
When connecting to pipe work do not use the
actuator for leverage. Valves should be held by
wrench flats on body. Place the AUTO/MAN lever
in the MAN position when filling, venting or draining
the system.
TAKE CARE NOT TO OVERTIGHTEN
SPECIFICATIONS
• Supply voltage 240V. AC 50Hz
• Power consumption: 6W
• Operating temperature range: +5 to +88
0 C
• Cable length one metre
• Max. differential pressure for 22mm = 1Bar
• Max. static pressure 10.0 Bar
• Max. ambient temperature 52 0 C
MOUNTING OPTIONS
Valves may be mounted vertically, or horizontally within
the limits shown in the diagram.
WARNING
All controls must be earthed. All valves should have a
means of disconnection from electrical mains supply
which incorporates a contact separation of at least 3mm
in all Poles.
All wiring must be carried out by a competent
Electrician.
TFC GROUP LTD
Tower House, Vale Rise, Tonbridge, Kent, TN9 1TB, Telephone: 01732 359888 Fax: 01732 354445
88 60
55 55
43.5
122
93
All dimensions in MM
Port AB =
Pumped flow from boiler
Port A = Heating circuit
Port B = Domestic hot water circuit
A B
AB
Mid - position Valve
Typical circuit showing Programmer, Room and Cylinder Thermostats as control elements
PROGRAMMER HEATING H,WATER
L N ON OFF OFF ON
INCLUDE IF PROGRAMMER HAS A
HEATING ONLY SELECTION
240V AC 50Hz
Supply fused
At 3A
COM
SAT CALL
ROOM
THERMOSTAT
COM
CALL SAT
CYLINDER
THERMOSTAT
TO BOILER & PUMP
VALVE
GRN /
Y
L
O
BL
UE
WH
IT
E
OR
A
N
GE
GRE
Y
45 0 45 0
VAL322MP and VAL328MP are 3 port spring return mid-position valves with 22mm and 28mm
compression fittings and switched output. These are for use on fully pumped systems which
when correctly wired with an appropriate room thermostat, cylinder thermostat and programmer
will control the water flow from the boiler to either to hot water only, heating only, or to both
simultaneously.