FIG. 59 |
The control is no longer able to read the boiler return sen- sor due to an open circuit (FIG. 59). The control will contin- ue to operate normally. Locate and repair the problem as described in INS7141. To clear the error message from the control after the sensor has been repaired, press either the Menu or Item button.
If the boiler return sensor was deliberately removed from the control, remove power from the control and repower the control to clear the error message.
FIG. 60 |
The control has detected no increase in the supply water temperature within the BOIL Alarm time setting. Check to see if the boilers are operating properly using the Test but- ton. To reset the alarm, press and hold the up and down arrow buttons for 5 seconds while in the VIEW menu.
TECHNICAL DATA
MP2 NINE STAGE BOILER & DHW / SET POINT
Control | - Microprocessor PID control; This |
| is not a safety (limit) control. |
Packaged Weight - - 3.3 lb. (1500 g), Enclosure A, blue modified PPO plastic
Power Supply | - 115 V (ac) + 10% 50/60 Hz | |
| 600 | Va |
Relay Capacity | - 230 V (ac) 5 A 1/3 hp pilot duty | |
| 230 | VA |
Demands |
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| - 20 to 260 V (ac) 2 VA |
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Sensors Included |
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| - NTC thermistor, 10 k |
| @ 77°F | ||||||||
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| (25°C + 0.2°C) B=3892 |
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Nine StageoilerB | & DHW /oinSetp |
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| Signal wiring muste batedr | at | least |
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Do not applyowerp |
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 10 11 | 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | H2026B | |||||
Com BoilBoilOutUnO | BoilCom Setp |
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| Prim |
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– | Sup Ret + | Sw | Dem Dem DH | N | L | P1 | 1 1 2 2 3 3 4 4 5 5 6 6 7 7 | 8 | 8 DHW | ||||||
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FIG. 61
The installer must ensure that this control and its wiring are isolated and/or shielded from strong sources of electromag- netic noise. Conversely, this Class B digital apparatus com- plies with Part 15 of the FCC Rules and meets all require- ments of the Canadian Interference - Causing Equipment Regulations. However, if this control does cause harmful interference to radio or television reception, which is deter- mined by turning the control off and on, the user is encour- aged to try to correct the interference by
CAUTION
The nonmetallic enclosure does not provide grounding between conduit connections. Use grounding type bush- ings and jumper wires.
Dimensions | - |
| (170 x 193 x 72 mm) |
Approvals | - CSA C US, meets ICES & FCC |
| regulations for EMI/RFI |
Ambient Conditions | - Indoor use only, 30 to 120°F (0 to |
| 50°C), <95% RH |
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