9
conTroL informATion
CoNtRol boaRD PoWER CoNSUmPtIoN:
0.8A max.
lED DISPlay lIGHtS
(Figure 6)
:
A total of 8 LED indicator lights display the following
information:
T-T (green): LED lit when thermostat calling for heat.
1.
Fault (Red): LED lit/flashes operating error/safety fault.
2.
Safety Switch (green): LED no safety faults.
3.
Circ (green): LED circulator terminals are energized.
4.
Heating Element#1 (green): LED element#1 is
5.
energized.
Heating Element #2 (green): LED element #2 is
6.
energized.
Heating Element #3 (green): LED element #3 is
7.
energized.
Heating Element #4 (green): LED element #4 is
8.
energized.
LimiT conTroL opErATion
When boiler water temperature exceeds high limit
1.
setting on aquastat, all heating element control relays
are instantly de-energized. Circulator continues
to operate until call for heat ends. When water
temperature drops below aquastat re-set differential,
heating element power relays close as per time delay
sequence.
maIN PoWER SUPPly
2.
:
Depending on model
designation, the electric Hydronic Block may be
energized by following alternating current service
entrances: 240 volt single phase 50 or 60 cycle 3 wire.
Wire size see Table A. Sizes listed for various capacity
units include total amperes necessary to operate
elements, circulator and zone valves where used. Wire
sizes specified conform to Canadian Electrical Code
(Canada) or National Electric Code (USA) and include
derating for ampacity and temperature.
Use copper
wire only.
Check state and local requirements.
Read data name plate before connecting unit. Electrical
connections are provided and located for proper
installation.
Use only copper wire of proper size and make sure all
terminations are tight.
Do not use aluminum wire!!
CIRCUlatoR PoWER SUPPly:
3.
Terminals identified
as C1(L) and C2(N) at bottom of control panel
(Figure 5) may be used to supply one circulator pump
power. Circulator motor shall not be larger than 1/6
horsepower with maximum 5.0 amp rating. Wiring from
control panel to the pump should have insulation rated
75°C. Circuit protection is provided by 15 amp breaker
or fuse (depending on option) on control board.
NotE:
If circulator pump is larger than maximum size
listed above, separate circulator pump relay must be
provided with separate overload protection. Where more
than one circulator is used for zoning, it must be installed
and protected according to approved electrical codes.
figurE 5
figurE 6
SIGNal/CoNtRol INPUtS:
tt:
Thermostat or zone valve end switch, switching
input, closed activation.
Hl:
High limit temperature sensors (factory installed),
normally closed.
lWC:
Low water cutoff (optional) end switch, normally
closed (factory installed jumper).
floW:
Flow switch (optional) end switch, normally
closed (factory installed jumper).
connEcTing ELEcTricAL poWEr suppLy