BENSON OUHA 100, Installation And User Instructions Manual

Page: 13 / 31

BENSON OIL UNIT HEATER
13
(h) Check that there is provision for flue gas
sampling and that this sample point can be
plugged and sealed after commissioning.
(i) Remove cover from fan limit stat check
that fan limit stat settings have not been
disturbed and are as follows
Fan Off 30º C
Fan On 50º C
Overheat Limit is preset at 100º C
check that overheat reset button is reset
(j) Ensure that the burner is securely
attached to the heater.
(k) Test for electrical earth continuity
between the heater, oil pipe work, and mains
supply.
(l) Turn on main electrical supply, select the
following switch settings on
CP2
On/Standby - Standby
Heat/Ventilation - Ventilation
The fan will start enabling fan direction etc to
be verified. Reset on/standby switch to off
position.
If CP4 supplied press Fan and enter to
operate fan, Repeat operation to switch off
fan
(m) Set
CP4 controller as per customer
requirements
(n) Set override to on (1) and put in override
time and enter
6.1 Commissioning - Ignition
It is strongly recommended that the separate
manual concerning the operational details of
the burner supplied with the heater as part of
the information package is studied prior to
commissioning.
Time intervals within the ignition sequence
will vary slightly from one model to another.
Warning
Do not proceed with commissioning unless
all the criteria detailed have been satisfied.
(a) Ensure that the electrical supply is turned
off.
(b) Ensure that the oil supply is turned off.
(c) If
CP2 supplied Select the following
switch settings on the control for the heater
On/Standby - Standby
Heat/Ventilation - Heat
(d) Turn on main electrical supply.
(e) Select 'on' position for heater on/standby
switch.
(f) Check for the following burner sequence
Interval Operation
5s Combustion air damper
actuated burner fan motor
initiates purge cycle
15s Solenoid valve opens
ignition transformer
provides spark for burner
ignition
-------------- EITHER-------------------
15s Ignition failure caused by
fuel starvation resulting in
burner lockout/shutdown
(g) Set heater on/standby switch to standby
position
(h) Attach oil manifold bleed screw and
gauge)
(i) Open oil supply valves and bleed air from
pipe work and adjust burner oil pressure as
per detailed in burner manual
(j) Repeat steps c,e,f.
----------------OR--------------
15s Burner ignition - flame
detection
20s Burner ignition cycle
complete