SECTION 11: O
PERATION
AND
M
AINTENANCE
57 of 71
SECTION 11: OPERATION AND MAINTENANCE
11.1 Se
q
uence of Operation
The control inside the heater's control compartment
is eq
u
ipped
w
ith a tri-color LED. The LED offers
comprehensi
v
e diagnostic capability. The LED
stat
u
s
w
ill be referenced thro
u
gho
u
t this section.
1. When the control is po
w
ered and there is no call
for heat from external heat demand de
v
ice, the
LED on the control flashes slo
w
green; LED is
ON for the same period it is OFF.
2. On a call for heat from the heat demand de
v
ice,
the heater
w
ill go to PRE-PURGE. The LED
indicates one green flash. The blo
w
er speed
w
ill
v
ary as the press
u
re s
w
itch setpoints are
v
erified. When the PRE-PURGE is s
u
ccessf
u
lly
completed, the heater
w
ill go into the
PRE-IGNITION state and po
w
er the hot s
u
rface
igniter (H.S.I.).
3. After the igniter
w
arms
u
p, the heater
w
ill go to
the IGNITION state. Po
w
er is s
u
pplied to the
gas
v
al
v
e operator, gas flo
w
s, ignites and the
flame is pro
v
en. The LED sho
w
s t
w
o green
flashes on the LED. If a flame is not sensed, the
heater
w
ill RETRY,
See Item 6
belo
w
for f
u
rther
details.
4. When the IGNITION state is completed, the
heater
w
ill go to WARM UP state. The
u
nit
w
ill
fire at maxim
u
m inp
u
t for 15 seconds. When the
WARM UP state is completed the de
v
ice
w
ill go
into RUN state. The control board
w
ill monitor
the heat demand de
v
ice and mod
u
late the
heater inp
u
t to meet the demand. The LED still
sho
w
s t
w
o green flashes.
5. When the call for heat has been satisfied, the
heater closes the gas
v
al
v
e. The blo
w
er
contin
u
es to r
u
n for a 45 second post-p
u
rge
period. After the post-p
u
rge, the heater t
u
rns
OFF and the LED on the control board flashes
slo
w
green.
6. If flame is lost at any time d
u
ring heater
operation, the heater
w
ill RETRY for ignition.
Upon RETRY the LED sho
w
s a fast yello
w
flash
(LED rapidly flashes). The heater
w
ill RETRY for
ignition three times. After fo
u
r ignition attempts,
the heater
w
ill locko
u
t for one ho
u
r or
u
ntil reset.
To reset the heater, remo
v
e po
w
er for 10
seconds, then re-apply po
w
er. T
u
rn heater ON
w
ith call for heat from the heat demand de
v
ice.
11.2 To Shut Off Heater
Set external heat demand de
v
ice to lo
w
est setting.
T
u
rn OFF electric po
w
er to heater.
T
u
rn OFF man
u
al gas
v
al
v
e in the heater s
u
pply line.
11.3 To Start Heater
T
u
rn gas
v
al
v
e and electric po
w
er OFF and
w
ait fi
v
e
min
u
tes for
u
nb
u
rned gases to
v
ent from heater.
T
u
rn ON main gas
v
al
v
e.
T
u
rn ON electric po
w
er.
Set heat demand de
v
ice to desired temperat
u
re.
B
u
rner sho
u
ld light a
u
tomatically.
11.4 Pre-Season Maintenance and Annual
Inspection
To ens
u
re yo
u
r safety and years of tro
u
ble-free
operation of the heating system, ser
v
ice and ann
u
al
inspections m
u
st be done by a contractor q
u
alified in
the installation and ser
v
ice of gas-fired heating
eq
u
ipment.
T
u
rn off gas and electric s
u
pplies before performing
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
Summary of Contents for Energytube EM-115
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Page 69: ...SECTION12 TROUBLESHOOTING 63 of 71 12 3 Troubleshooting Flow Chart ...
Page 70: ...EM SERIES INSTALLATION OPERATION AND SERVICE MANUAL 64 of 71 ...
Page 72: ...EM SERIES INSTALLATION OPERATION AND SERVICE MANUAL 66 of 71 12 5 Pneumatic Connections ...
Page 74: ...EM SERIES INSTALLATION OPERATION AND SERVICE MANUAL 68 of 71 ...
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