Rheem Raypak Hi Delta 302C, Инструкция по установке и эксплуатации

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Operation
• Run full system flow for 2-minutes.
• Initiate PID pump control to achieve target inlet
temperature by slowing injector pump.
• Boiler ∆T will not increase during bypass operation.
• If target temperature is not achieved after 7-minutes
from “call for heat”, the system will shut down.
Cold Run Sequence of Operation
1. Supply separate 220VAC, 1 phase, 60 Hz power
for the Hitachi Inverter (blue-colored inverter), or
120VAC or 220VAC, 1 phase, 60 Hz power for the
AC Tech Inverter (white-colored inverter).
2. Call for heat occurs at heater.
3. The heater outputs 24VAC to terminal 4 of terminal
block 3 located in Cold Run controller.
4. Terminal 4 of TB 3 sends 24VAC to the coil of the
SPST relay located in the cold run control panel.
5. The SPST relay coil is energized and closes
the contacts allowing 24VAC from the Cold Run
control transformer to be sent to the CFH terminal
of the Cold Run circuit board.
a. A two-second delay occurs from the CFH
signal waiting to send power from terminal MC
of the cold run circuit board.
6. 24VAC is sent from terminal 2 of terminal block 3
to the NO contacts of the DPST relay located in the
cold run control panel.
7. After the two-second delay on the cold run circuit
board, pin MC outputs a 24VAC signal to terminal
AL0 of the Hitachi inverter.
8. The AL0 relay closes and outputs a 24VAC signal
to the coil of the DPST relay located in the cold run
control panel.
9. The DPST relay coil energizes and closes the NO
contacts.
10. Once the NO contacts of the DPST close, the heater
24VAC is sent back to the heater to complete the
circuit (pin 3 of terminal block 3) and the interlock
circuit (pin 1 & 2 of terminal block 3) allowing the
heater to fire.
11. Pin SC of the cold run circuit board sends 10VDC
to Pin 1 (Forward) on Hitachi Inverter.
12. PCS terminal on Inverter outputs 12VDC signal to
the common terminal of the reset switch located on
the bottom of the cold run control panel.
13. The 12VDC signal crosses over the reset switch
and goes to Pin FS and to pin S1 on cold run circuit
board.
14. Pin FR on the TVC board outputs 10VDC to pin O
of the Inverter to drive injector pump at full speed for
2-minutes waiting for the heater to reach full fire.
15. After the 2-minute delay the 10VDC output signal
from pin FR reduces to approximately 8VDC at the
inverter thus slowing the pump to approximately 50
Hz.
The output signal continues to vary depending on the
heater inlet temperature.
The heater will lockout and shut down if the setpoint on the
inlet temperature is not achieved within 7-minutes from a
call for heat.
Figure 33. Control Board