44
FIGURE 8-4 Thermostat Connections
A
RoomThermostat
8 - ELECTRICAL CONNECTIONS
FIGURE 8-5 Outdoor Sensor Connections
1k Ω
Note
Sensors used for this boiler are proprietary
to the manufacturer. Use of after market
sensors will diminish boiler performance.
A. Connect Room Thermostat
•
turn power off to boiler;
• access terminal block
M2
;
• connect room end switch to terminals
6(R)-
7(W)-8(C)
; Do not apply dry voltage between 2
terminals. Dry contact only.
• turn boiler power on;
• verify room end switch operates per end switch
manufacturer instructions.
NOTE:
maximum load allowed is 10 mA
Dry contact end switches from various manufacturers
can be attached to boiler control PCB.
8.5 Install Room Thermostat
Install room end switch on inside wall. Do not install
where it will be influenced by drafts, hot or cold water
pipes, lighting fixtures, television, sun rays or near a
fireplace.
Dry contact only - do not apply 24 volts between 6 and 7.
8.6 Outdoor Air Sensor (OAS) Electrical Connections
A. 1K Ohm (1K
Ω) Optional Outdoor Air Sensor (OAS)
To connect this accessory, see Figure 8-5, terminals
4-5, and instructions supplied with
1K
Ω
sensor.and
instructions supplied with
1K
Ω
sensor.
B. Setting "Kt" Climate Curve
1.
Boiler automatically recognizes OAS sensor when
wired to M2 terminal block. Display changes to show
current default “
Kt
” value (80). Note display value.
2.
When operating in CH mode, boiler setpoint is
determined by the
Kt
value selected and actual
outside air temperature. Refer to applicable °F (or
°C) chart, (pg. 30) for setpoint information.
• Select
Kt
range which will satisfy the desired
boiler delivery temperature based on outdoor
temperature range expected for your location. For
example: if you need 176°F water when the outside
temperature is 20°F and colder, select 35 for your
Kt
setting.
• To change”default”
Kt
value on boiler control use
or
CH Heating buttons.
• Restrict the upper limit of the
Kt
curve by using
Parameter P16 to set the maximum boiler water
temperature. P16 Default is 176°F.
3.
When scrolling has stopped, boiler will automatically
“SAVE” value as new
Kt
default value and
automatically return to CH mode when no
Kt
adjustment activity is sensed.
Kt
values can be
changed in +/- 1 point increments.
4.
To return, to verify or change current
Kt
“default
value, depress one of the CH setpoint adjustment
buttons (once),
or
, while in any heating or
standby mode. Adjust
Kt
value to obtain desired
comfort level.
240013503 REV A, [03/15/2022]
Summary of Contents for UTICA BOILERS MACF-115
Page 2: ...MACF 150...
Page 4: ...MAHF 125...
Page 77: ...73 A 1 MODEL 75 100 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 78: ...74 A 2 MODEL 125 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 79: ...75 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013503 REV A 03 15 2022...
Page 80: ...76 APPENDIX A WIRING DIAGRAMS A 4 MODEL 115 Combi 240013503 REV A 03 15 2022...
Page 81: ...77 A 5 MODEL 150 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 82: ...78 A 6 MODEL 205 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 117: ...33 PN 240012875 REV D 03 15 2022 MODEL 75 100 HEAT ONLY 75 100 HEAT ONLY WIRING DIAGRAM...
Page 118: ...34 PN 240012875 REV D 03 15 2022 MODEL 125 HEAT ONLY 125 HEAT ONLY WIRING DIAGRAM...
Page 119: ...35 PN 240012875 REV D 03 15 2022 MODEL 165 HEAT ONLY 165 HEAT ONLY WIRING DIAGRAM...
Page 120: ...36 PN 240012875 REV D 03 15 2022 115 COMBI WIRING DIAGRAM MODEL 115 COMBI...
Page 121: ...37 PN 240012875 REV D 03 15 2022 MODEL 150 COMBI 150 COMBI WIRING DIAGRAM...
Page 122: ...38 PN 240012875 REV D 03 15 2022 MODEL 205 COMBI 205 COMBI WIRING DIAGRAM...
Page 128: ...44 PN 240012875 REV D 03 15 2022 LOW WATER CUTOFF LOW WATER CUTOFF DETAIL NO NO YES...
Page 133: ...49 PN 240012875 REV D 03 15 2022 3 FAULT SOLUTION SECTIONS...
