Comfort-Aire HKV300A - Manual (Page 22)

Installation, Operation & Maintenance HKV SERIES Heat Controller, LLC
21
CXM Control
For detailed control information, see CXM or DXM Application,
Operation and Maintenance (AOM) manual (part # 97B0003N12
or part #97B0003N13).
Field Selectable Inputs
Test mode: Test mode allows the service technician to check the
operation of the control in a timely manner. By momentarily short-
ing the test terminals, the CXM control enters a 20 minute test
mode period in which all time delays are sped up 15 times. Upon
HQWHULQJWHVWPRGHWKHVWDWXV/('ZLOOÀDVKDFRGHUHSUHVHQW-
ing the last fault. For diagnostic ease at the thermostat, the alarm
relay will also cycle during test mode. The alarm relay will cycle on
and off similar to the status LED to indicate a code representing
the last fault, at the thermostat. Test mode can be exited by short-
ing the test terminals for 3 seconds.
Retry Mode: If the control is attempting a retry of a fault, the status
/('ZLOOVORZÀDVK VORZÀDVK RQHÀDVKHYHU\VHFRQGV WR
indicate the control is in the process of retrying.
)LHOG&RQ¿JXUDWLRQ2SWLRQV
1RWH ,QWKHIROORZLQJ¿HOGFRQ¿JXUDWLRQRSWLRQVMXPSHUZLUHV
should be clipped ONLY when power is removed from the CXM
control.
Water coil low temperature limit setting: Jumper 3 (JW3-FP1 Low
7HPS SURYLGHV¿HOGVHOHFWLRQRIWHPSHUDWXUHOLPLWVHWWLQJIRU)3
of 30°F or 10°F [-1°F or -12°C] (refrigerant temperature).
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
Air coil low temperature limit setting: Jumper 2 (JW2-FP2 Low
7HPS SURYLGHV¿HOGVHOHFWLRQRIWHPSHUDWXUHOLPLWVHWWLQJIRU)3
of 30°F or 10°F [-1°F or -12°C] (refrigerant temperature). Note:
This jumper should only be clipped under extenuating circum-
stances, as recommended by the factory.
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
$ODUPUHOD\VHWWLQJ -XPSHU -:$/'U\ SURYLGHV¿HOGVHOHF-
tion of the alarm relay terminal AL2 to be jumpered to 24VAC or to
be a dry contact (no connection).
Not Clipped = AL2 connected to R. Clipped = AL2 dry contact (no
connection).
DIP Switches
1RWH ,QWKHIROORZLQJ¿HOGFRQ¿JXUDWLRQRSWLRQV',3VZLWFKHV
should only be changed when power is removed from the CXM
control.
',3VZLWFK 8QLW3HUIRUPDQFH6HQWLQHO'LVDEOHSURYLGHV¿HOG
selection to disable the UPS feature.
On = Enabled. Off = Disabled.
DIP switch 2: Stage 2 Selection - provides selection of whether
compressor has an “on” delay. If set to stage 2, the compressor
will have a 3 second delay before energizing. Also, if set for stage
2, the alarm relay will NOT cycle during test mode.
On = Stage 1. Off = Stage 2
DIP switch 3: Not Used.
DIP switch 4: DDC Output at EH2 - provides selection for DDC
operation. If set to “DDC Output at EH2,” the EH2 terminal will
continuously output the last fault code of the controller. If set to
“EH2 normal,” EH2 will operate as standard electric heat output.
On = EH2 Normal. Off = DDC Output at EH2.
NOTE: Some CXM controls only have a 2 position DIP switch
package. If this is the case, this option can be selected by clipping
the jumper which is in position 4
of SW1.
Jumper not clipped = EH2 Normal. Jumper clipped = DDC Output
at EH2.
DIP switch 5: Factory Setting - Normal position is “On.” Do not
change selection unless instructed to do so by the factory.
6ORZ)ODVK ÀDVKHYHU\VHFRQGV
)DVW)ODVK ÀDVKHVHYHU\VHFRQG
)ODVKFRGH TXLFNÀDVKHVVHFRQGSDXVHTXLFN
ÀDVKHVVHFRQGSDXVHHWF
-On pulse 1/3 second; off pulse 1/3 second
'HVFULSWLRQRI2SHUDWLRQ /(' $ODUP5HOD\
1RUPDO0RGH 2Q 2SHQ
1RUPDO0RGHZLWK836:DUQLQJ 2Q &\FOH FORVHGVHF2SHQVHF
&;0LVQRQIXQFWLRQDO 2II 2SHQ
)DXOW5HWU\ 6ORZ)ODVK 2SHQ
/RFNRXW )DVW)ODVK &ORVHG
2YHU8QGHU9ROWDJH6KXWGRZQ 6ORZ)ODVK 2SHQ &ORVHGDIWHUPLQXWHV
7HVW0RGH1RIDXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH+3)DXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH/3)DXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH)3)DXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH)3)DXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH&2)DXOWLQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH2YHU8QGHU
VKXWGRZQLQPHPRU\
)ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH836LQPHPRU\ )ODVKLQJ&RGH &\FOLQJ&RGH
7HVW0RGH6ZDSSHG7KHUPLVWRU )ODVKLQJ&RGH &\FOLQJ&RGH
Table 6a: CXM LED And Alarm Relay Operations
CAUTION! Do not restart units without inspection and rem-
edy of faulting condition. Equipment damage may occur.
CXM Controls
CAUTION!
! !