Camus Hydronics DFH1100, Инструкция по установке, эксплуатации и обслуживанию

Страница: 30 / 70

25
•
Operation as a control for inlet water temperature.
•
Optional tank mounted sensor used in conjunction with
inlet sensor.
•
Adjustable pump delay feature based on ∆ T
temperature difference between inlet and outlet
temperatures. Accepts 1/6 hp. pump directly across
terminals 13 & 14. An optional 1 HP relay is available.
•
Adjustable; target temp, inter-stage differential, on
delay between stages, minimum on time per stage,
minimum off time per stage.
•
Display of run hours for maintenance purposes.
Counter wraps around at 10000 hours. Pressing and
holding up and down arrow key simultaneously will
reset the counter.
•
Flame failure signal 24V.
•
Molex connector for ease of service.
•
Error message display.
•
Test override feature to test pump operation, stages 1,
2, and alarm. Press and hold the UP button to test.
After one second the pump will turn ON. Stage 1 will
turns ON after four seconds. Stage 2 will turn ON after
seven seconds. Alarm will turn ON after ten seconds.
The controller will return to normal operation after
releasing the UP button.
•
Pump exercising feature runs pump 10 seconds every
three days of no pump operation.
Setting the Appliance Temperature Control
Press and hold the ITEM, UP and DOWN buttons
simultaneously for 3 seconds. The appliance will shut
down. Press the ITEM key and then select the desired
setting using the UP, DOWN buttons. Pressing the ITEM
key again will cause the last setting to be accepted. Once
all settings have been made, wait for 30 seconds for the
control to return to normal operating mode. In normal
operating mode the inlet temperature, outlet temperature,
∆
T temperature and ON hours can be viewed by repeatedly
pressing the ITEM key only. If you wish to check the setting
you will have to start again by pressing and holding the
ITEM, UP and DOWN buttons simultaneously for 1 second,
and then use only the ITEM key to scroll through the
settings. After checking the settings allow the control to
return to normal operation on its own. Default display is
outlet temperature.
Summary of 8 Modes of Operation
Mode
1
- For setpoint control at heater inlet sensor. Use for
hydronic constant setpoint heating or domestic hot
water applications.
- External heat demand or constant pumping
required.
Mode 2
- For setpoint control at system sensor
- Ideal for monitoring constant hot loop or for pool
heating
- Intermittent pumping provided.
Mode 3
- For DHW control with tank sensor. Controls to
boiler inlet sensor.
- Intermittent pumping provided
Mode 4
- For hydronic heating with outdoor reset.
Temperature control at boiler inlet sensor with
proportional modulating logic.
Mode 5
- For hydronic heating with outdoor reset.
Temperature control at system sensor with
selectable P.I.D. or proportional modulating logic.
- Intermittent pumping provided
Mode 6
- External analogue 0-10VDC signal generates
temperature target. Setpoint temperature control
at heater inlet sensor using proportional
modulating logic.
- Intermittent pumping provided
Mode 7
- External analogue 0-10VDC signal generates
temperature target. Setpoint temperature control
at system sensor with selectable PID or
modulating logic.
- Intermittent pumping provided.
Mode 8
- External analogue 0-10VDC signal closes the
stage contacts to initiate heater. Modulating output
of the control follows the analog external input
signal. Temperature is controlled remotely
independently of local settings. Boiler max. setting
remains functional.
- Intermittent pumping provided
Mode 1: Constant Temperature Control
This mode is designed for hydronic heating or domestic hot
water (DHW). Once a heat demand is present, the BTC 1
turns on the appliance pump and modulates the boiler
burner to maintain the boiler target at the boiler inlet sensor.
A heat demand is generated when a 24VAC is applied
across CD (common demand) and Ht D (heat demand).
Once voltage is applied, the BTC 1 turns on the Dem 1
segment in the display.
If the inlet sensor is ½ (half) of the differential below the
BOIL TARGET, the BTC 1 then changes the proportional
modulation output to the START modulation setting, the
Stage contact (pins 15 & 16) close to proceed to trial for
ignition. The burner remains at minimum modulation until
the flame is proved and then the modulating output
changes the boiler burner output to maintain the
programmed boiler target temperature at the inlet sensor. If
the inlet sensor reaches ½ (half) of the differential above
BOIL TARGET setting, the burner shuts off. Once the
external heat demand is removed, the BTC 1 turns off the
appliance and operates the boiler pump based on the
PUMP DELAY setting.
The water temperature is controlled based on a fixed
setpoint (BOIL TARGET).The setpoint for inlet water is pre-
set to 120
o
F and the auto re-set limit is set to 210°F and is
fixed. In addition to the auto reset limit the factory installs a
manual re-set limit set to 250°F.