Time-Clock Instructions; Commissioning And Testing; Filling The Water System; Commissioning The Boiler - Sime benchmark FRIENDLY FORMAT Installation And Servicing Instrucnions

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1 2 5
KEY
1 Thermomanometer
2 Timer-programmer housing
3 Rotary switch
4 Electronic board
4

COMMISSIONING AND TESTING

SIME SUPPORT THE BENCHMARK INITIATIVE
All relevant sections of the logbook must be filled in at the
time of installation and thereafter service information on the
back page of the logbook. Commissioning of the boiler is not
complete until the logbook is filled in.
Before commissioning the appliance, the whole gas installa-
tion including the meter MUST be purged and tested for gas
soundness in accordance with BS6891.
IMPORTANT: open all doors and windows, extinguish naked
lights, and DO NOT SMOKE whilst purging the gas line.
Before commencing the commissioning procedure, ensure
that the gas service cock is turned on, the electricity sup-
ply is isolated, and that the D.H.W. and C.H. isolation valves
are in the closed position.
4. 1

FILLING THE WATER SYSTEM

– Open the C.H. flow and C.H. return valves (17 - 18 fig. 2).
– Loosen the automatic air vent cap (9 fig. 2).
– Open all radiator valves and system air vents. Fill the sys-
tem with water using one of the approved methods
described in section 2.9 to about 0.5 bar greater than
the system design pressure. Close all air vents. Do not
forget the one near the pump!
– Check the system for water soundness.
– Completely drain the appliance and heating system, thorough-
ly flush the system, and refill the system design pressure.
– Open the D.H.W. inlet valve, open any hot tap, clear of air
bubbles. Close hot tap.
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7
8
3 4
5 Earth faston
6 Instrument protection
7 Room stat cover
8 Room stat connector
3. 1 1

TIME-CLOCK INSTRUCTIONS

Setting the time
Turn the programming dial in clockwise direction to set the
read off the 24-hour dial opposite the marking.
Program setting
Press inwards the segments on the program disk corre-
sponding to the selected switching periods.
Function 1: segment set outwards (C.H. "ON")
Function 2: segment set inwards (C.H. "OFF")
Programming characteristics
Cycle Number of actions
per cycle
24 hour
Manual override
0 = "OFF" permanently
= automatic programmed operation
Fig. 19
1 = "ON" permanently
4.2

COMMISSIONING THE BOILER

– Remove the screw and connect a pressure gauge to the
burner pressure test point on the gas valve (fig. 20 "SIT TAN-
DEM 837" gas valve - fig. 20/a "SIT SIGMA 845" gas valve).
– Ensure that the rotary switch on the facia panel is set to the
SUMMER position "
mostat to maximum (fully clockwise), and turn on the electri-
cal supply. Fully open any D.H.W. tap and the burner will light.
– Allow the boiler to run for at least 5 minutes and check
that the burner pressure is as stated in section 1.3. The
D.H.W. burner pressure is factory set and should not
require adjusting. If the burner pressure is low, check that
the appliance has not begun to modulate (this will occur if
the D.H.W. flow rate is low. If modulation is suspected, open
all D.H.W. taps to maximise flow and recheck burner pres-
sure). Check also the inlet pressure with the burner alight;
this should be 20 mbar (8 in.wg) +/- 2.5 mbar (1 in.wg) for
natural gas. If it is necessary to adjust the D.H.W. burner
pressure the method is described in section 8.6.
– Reduce the D.H.W. draw off rate to the minimum neces-
sary to maintain the burner alight by carefully adjusting
the D.H.W. inlet valve and check that the burner pressure
decreases in response to D.H.W. temperature rise. Fully
open the inlet valve.
– Close the D.H.W. tap and ensure that the burner is extin-
guished and the pump stops.
4.3 SETTING THE C.H. INPUT
– Turn the rotary switch to the WINTER position "
ensure that the room thermostat (if fitted) is calling for
Program time Min. interval between
per segment
96 15 min.
" (D.H.W. Only), turn the D.H.W. ther-
two actions
15 min.
❄
" and