Ingersoll-Rand ReliaTel, Руководство пользователя, Страница: 162 / 176

162 RT-SVD03L-EN
P1) on the ECA. When the relay contacts are closed for
night mode operation the ECA uses a default damper
minimum position of 0%. When they are not closed it
uses the standard minimum position adjustment on the
ECA as default.
[Gas/Electric] Heating
The Novar controller uses its zone temperature input
and setpoint input to determine when to initiate
requests for compressors or heat. Calls for heating are
interpreted by the ReliaTel™ controller as thermostat
requests. When the zone temperature is sufficiently
lower than the setpoint the Novar will energize its H
He ea att
1 1 (W1) output to turn the first stage of heat on. It will
also close the contacts on its Fan (G) output to call for
the supply fan to turn on.
The first stage of [Gas/Electric] heat will energize. If
additional heating capacity is required above that
provided by the first stage the second stage of [Gas/
Electric] will be activated by energizing the H
He ea att 2 2 (W2)
output.
Once the zone temperature rises above the setpoint
sufficiently the heat and fan outputs on the Novar
controller will be deactivated and the RTRM will
respond appropriately and deactivate its respective
outputs.
On gas heat units the supply fan will remain on for a
period of 90 seconds after heat is deactivated for free
heating and heat exchanger cool down.
Novar Controls Checkout/
Troubleshooting Procedure
General
The Novar electronic thermostat module (ETM)
includes an installation manual that describes the basic
connections and checkout of the Novar controller. This
manual should be consulted during installation,
checkout, or troubleshooting.
If problems are encountered with unit operation after
consulting the Novar ETM installation manual, the
following checkout procedures may help to determine
and isolate the cause of the problem.
Checkout Procedure
1. If the Novar controller is connected to the BAS
network, check for any failure messages related to
the controller in question. Take appropriate actions
if messages exist.
2. Verify proper power connection and that it is
connected to a 24VAC source with at least a 10VA
consumption rating.
3. Apply power to the unit.
4. Verify all installed boards are energized by checking
the status LED's on each. On the Novar board the
Status LED will either be OFF if in Scheduled On
mode and blink ON when network communications
are exchanged, or be ON steady and blink OFF
during communications if in scheduled ON mode.
The status lights on the main ReliaTel™ control
modules will be on steady if the boards are
powered up and properly communicating on the
inter-module bus.
5. Check the 1-amp fuse on the Novar ETM (located
next to the night mode output relay) for integrity.
6. Verify all inputs are connected according to the
ETM installation instructions.
7. Other than economizer connection verification, for
all jumper locations and short connections refer to
the ETM.
8. Apply a short across the jumper tabs on the fan
output relay on the ETM. Verify the supply fan
energizes within a few seconds. Remove the short.
The supply fan should turn off within a few
seconds. If the supply fan does not energize, verify
proper connection of the Fan output relay to the
RTRM thermostat-G input and verify the supply fan
relay on the RTRM is properly connected.
9. To completely check economizer (if installed)
operation, the conditions at the mixed air
temperature sensor must be at least 55° F or
warmer. The mixed air temp sensor is located
downstream of the indoor coil so this test should be
performed in the absence of active compressor
operation. This would produce sub-cooled air
across the mixed air sensor that would prevent the
economizer from opening. Mixed air sensor
resistance should be less than 20K.
10. To verify proper economizer operation, place a
short across the jumper tabs on the fan output relay
and the night mode output relay. Ensure that the
100K resistor is in place on the Outdoor Air Temp
(OAT) input on the economizer module. Verify the
supply fan energizes and the outdoor air damper
opens to the minimum position set by the on-board
economizer module potentiometer.
Once the damper reaches minimum position apply
a short across the night mode output relay. The
damper should close completely. Disconnect the
short and verify the damper opens back to
minimum position.
11. If the outdoor air damper does not actuate as
described above, verify proper operation and
connection of the economizer actuator as described
in the ReliaTel™ controls installation guide. Also
verify proper connection between the night mode
damper relay and the P and P1 connections.
12. To continue the economizer operation check, place
a short across the jumper tabs on the damper
output relay. If conditions are warm enough at the
mixed air sensor the economizer actuator should
begin opening the damper toward fully open.
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