Modine Manufacturing G20 Installation And Service Manual Download Page 1

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installation and service manual

gas-fired unit heaters

models PDE

G20, G31

6-592

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ntts

Pages

Inspection on arrival..............................................................1
Special precautions ..............................................................2
General introduction .............................................................3
Technical data....................................................................3-4
Installation .........................................................................4-6

Positioning heater..............................................................4
Ventilation..........................................................................5
Unit suspension.................................................................5
Flue system....................................................................5-6
Piping ................................................................................6
Gas supply ........................................................................6
Electrical supply ................................................................6

Commissioning .....................................................................7
Servicing ...............................................................................8
Wiring Diagram .....................................................................9
Major Component Location ..................................................9
Replacement of parts .........................................................10
Fault finding ........................................................................11
Spare parts list ..............................................................11-12

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THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN
YOU LEAVE THE JOB.

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Inspect unit upon arrival. In case of damage, report
immediately to transportation company, and your local sales
representative.

Inspect unit received for conformance with description of
product ordered.

IMPORTANT

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August, 1999

0120

Summary of Contents for G20

Page 1: ...u ui is sh h a an ny y o op pe en n f fl la am me e 4 4 I Im mm me ed di ia at te el ly y c ca al ll l y yo ou ur r g ga as s s su up pp pl li ie er r F FO OR R Y YO OU UR R S SA AF FE ET TY Y T Th he e u us se e a an nd d s st to or ra ag ge e o of f g ga as so ol li in ne e o or r o ot th he er r f fl la am mm ma ab bl le e v va ap po ou ur rs s a an nd d l li iq qu ui id ds s i in n o op pe en ...

Page 2: ...ttom of the unit is 300mm however see page 2 section 16 which may require greater clearances for servicing and from the sides 450mm For PDE units sizes 30 50 minimum clearance from the top is 25mm and from the flue collar 50mm for PDE units sizes 75 300 minimum clearance from the top is 50mm and from the flue collar is 75mm for PDE unit 350 minimum clearance from the top is 75mm and from the flue ...

Page 3: ...N NI IT T H HE EA AT TE ER RS S P PD DE E M MO OD DE EL LS S G GE EN NE ER RA AL L I IN NT TR RO OD DU UC CT TI IO ON N T TA AB BL LE E 1 1 T TE EC CH HN NI IC CA AL L D DA AT TA A A H D OPENING BB E AA B K W X F C K G L Approx MIN DISTANCE TO WALL IS L 6 J VENT PIPE EE MIN DISTANCE TO WALL L LL D Di im me en ns si io on ns s m mm m D Di im me en ns si io on n M Mo od de el l N Nu um mb be er r P ...

Page 4: ...e ee e p pa ag ge e 1 12 2 f fo or r p pr ro op pa an ne e d de et ta ai il ls s Based on natural gas typical calorific value 37 78 MJ M3 At 18 C ambient and unit fired at full rated input Mounting height as measured from bottom of unit N NO OT TE E N NO OT T A AL LL L M MO OD DE EL LS S A AR RE E A AV VA AI IL LA AB BL LE E I IN N T TH HE E U UK K C CH HE EC CK K W WI IT TH H Y YO OU UR R S SU UP...

Page 5: ... panels screws are on back flange of side panel exposing the adjustable mounting brackets Fig 2 Loosen the set screws holding the mounting brackets in place and using a rubber mallet or something similar tap the heater into a position where it does hang level Tighten set screws and replace the outer side panels The PDE 350 and PDE 400 have four mounting holes in the top of the unit T To o e en ns ...

Page 6: ...04 316 may be used in conjunction with a 50mm minimum thick layer of vermiculite or perlite granules between the liner and the inner skin of the chimney body Liners should be sealed at both the top and the bottom In situations where a conventional flue is inappropriate a flue boost kit is available for all PDE models allowing up to 10 metres or equivalent length of horizontal flue 2 2 5 5 P Pi ip ...

Page 7: ...on gas control A short flame can be caused by a dirty pilot injector Pilot flame condition should be observed periodically to ensure trouble free operation 3 2 4 Move gas control knob to ON 3 2 5 Set room thermostat to desired setting 3 2 6 Check gas piping for leaks as described in IM 5 3 2 7 Check gas input rate by measuring burner pressure using the manometer fitted to test point at the outlet ...

Page 8: ...r rm mo os st ta at t The overheat thermostat bulb mounted on the left inner side panel when facing front of unit body in junction box will shut off the gas supply to the main burner in the event of overheating The manual reset button is located beneath a black screw off cap positioned on the side of the junction box See Figs 6 and 7 It is a single pole single throw switch The contacts open to shu...

Page 9: ...L FAN MOTOR CONDENSER MANUAL RESET FOR OVERHEAT THERMOSTAT BENEATH BLACK CAP JUNCTION BOX R RE EA AR R V VI IE EW W FLUE CONNECTION V VI IE EW W F FR RO OM M B BE EL LO OW W B BO OT TT TO OM M P PA AN N O OP PE EN N TAPPED MOUNTING HOLES Overheat Thermostat with interupter to gas valve capillary with sensor to heat exchanger Manual reset button located beneath black screw off cap 230V Thermostat B...

Page 10: ...hermostat in the heater junction box and feed back through the cable grommet Replace component and reassemble in reverse order 5 5 6 6 D De el la ay y T Ti im me er r The delay timer is located in the junction box Remove the junction box front cover by taking out the two retaining screws Remove the single retaining screw from beneath the junction box pull off the electrical connectors taking care ...

Page 11: ...t l li ig gh ht t P PO OS SS SI IB BL LE E C CA AU US SE ES S A AN ND D R RE EM ME ED DI IE ES S a Check power to appliance is turned on b Check room thermostat and time switch if fitted are calling for heat c Check that knob on combination gas control is in ON position d Be sure pilot is lit correctly positioned and strong enough to ignite burner ports e Check wiring electrical power supply to co...

Page 12: ... pt t 125 150 200 225 400 450 450 400 750 850 950 1 200 w wa at tt ts s T TA AB BL LE E 4 4 P Pe er rf fo or rm ma an nc ce e P Pr ro op pa an ne e U Un ni it ts s O On nl ly y Based on propane gas typical calorific value 91 65 MJ M3 At 18 C ambient and unit fired at full rated input Mounting height as measured from bottom of unit Head Office Kitson s Works Aylesbury Road Bromley Kent BR2 0QZ Tel ...

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Modine Manufacturing G20, Installation And Service Manual

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