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Modine Manufacturing G20 Installation And Service Manual

Manual is about: gas-fired unit heater

Summary of G20

  • Page 1

    Installation and service manual gas-fired unit heaters models pde g20, g31 6-592 5 5h h7 75 50 04 47 7a a c co on ntte en ntts s pages inspection on arrival..............................................................1 special precautions ...............................................................

  • Page 2

    2 2 t th he e iin ns st ta al ll la at tiio on n a an nd d m ma aiin nt te en na an nc ce e iin ns st tr ru uc ct tiio on ns s iin n t th hiis s m ma an nu ua al l m mu us st t b be e f fo ol ll lo ow we ed d t to o e en ns su ur re e s sa af fe e,, e ef ff fiic ciie en nt t a an nd d t tr ro ou ub ...

  • Page 3

    3 3 these instructions are for the pde unit set up as a category i 2h heater to use natural gas (g20) at a nominal supply pressure of 20mbar. This is one of its many ce certified forms. Information on the pde unit set up as a catergory i 3+ heater to use propane (g31) at a nominal suppy pressure of ...

  • Page 4: Caution

    4 4 iin ns st ta al ll la at tiio on n 2 2..1 1 p po os siittiio on niin ng g u un niitt h he ea atte errs s when siting units, consider general spaceheating requirements, availability of gas, and proximity to flue locations. Unit heaters should be positioned so heated air streams wipe exposed walls...

  • Page 5: Caution

    5 5 safe, efficient and trouble free operation of conventionally flued appliances is vitally dependent on the provision of an adequate supply of fresh air to the room in which the appliance is installed. In buildings having a design air change rate of less than 0.5/h, and where indirect fired heater...

  • Page 6: Caution

    6 6 do not use a flue smaller than the flue pipe connection on the unit. Flue should be stainless steel, aluminum or other suitable corrosion resistant material. Install with a minimum upward slope from unit of 20mm per metre and suspend securely from overhead structure at points no greater than 1 m...

  • Page 7: Caution

    7 7 before commencing commissioning: ensure that the electrical supply is off. Extinguish all naked lights and open all doors and windows. D do o n no ot t s sm mo ok ke e. Check that the gas supply is turned on at the meter and that the main gas cock is open. Loosen the union and allow air to be pu...

  • Page 8: Caution

    8 8 it is recommended that a full service be carried out at least once a year by a qualified heating engineer (corgi registered). 4 4..1 1 c clle ea an niin ng g tth he e h he ea atte err 4 4..1 1..1 1 m ma aiin n b bu urrn ne err lower bottom pan by removing wing screws on the unit base. Disconnect...

  • Page 9

    9 9 f fiig gu urre e 6 6 a aiirr h he ea atte err w wiirriin ng g d diia ag grra am m f fiig gu urre e 7 7 m ma ajjo orr c co om mp po on ne en ntt l lo oc ca attiio on n manifold mixer tubes burner retaining pin main burner orifices manifold mounting screw and pin overheat thermostat bulb louvres f...

  • Page 10: Caution

    1 10 0 t to o rre ep plla ac ce e:: 5 5..1 1 b bu urrn ne err//p piillo ott//tth he errm mo oc co ou up plle e lower bottom pan by removing wing screws on the unit base. Disconnect pilot pipe, and thermocouple lead from multifunctional control. Remove the two burner retaining pins holding the burner...

  • Page 11

    1 11 1 6 6..1 1 iiff p piillo ott d do oe es s n no ott lliig gh htt:: p po os ss siib bl le e c ca au us se es s a an nd d r re em me ed diie es s a. Check that manual gas control knob on combination gas control is in the pilot position. B. Bleed air from the pilot line (take special care when blee...

  • Page 12

    M mo od de ell n nu um mb be err-p pd de e 3 30 0 5 50 0 7 75 5 1 10 00 0 1 12 25 5 1 15 50 0 1 17 75 5 2 20 00 0 2 25 50 0 3 30 00 0 3 35 50 0 4 40 00 0 h he ea att iin np pu utt ((g grro os ss s)) k kw w 8.8 14.7 22 29.3 36.6 44 51.3 58.6 73.3 87.9 102.6 117.2 h he ea att iin np pu utt ((n ne ett)...