Reznor ULSA 035(EC) - Page 24

1701ULSA(EC)--EN, p. 24/30
Substitutionofgasvalv e
(differsaccordingtotheapplicationandhastobeorderedatyourdistributor)
1. Checkthattheaircirculationfanhasstoppedrunning.
2. Beforestartingensurethattheelectricalsupplyisturnedoffandlocked.
3. Checkthatthegassupplyisturnedoff.
4. Removetheservicepanel(see
‘removaloftheservicepanel’)..
5. Disconnecttheburnerrelayfromthegasvalveunscrewingthefixingscrew.
6. Takeashortscrewdriverandremovethescrewsconnectingthegasvalveandtheairintakerestriction.
7. Disconnectthegasvalvefromthegasconnection.
8. Replacethe
gasvalveinreverseorder.

Substitutionofoneoftherelays
1. Checkthattheaircirculationfanhasstoppedrunning.
2. Beforestarting,ensurethattheelectricitysupplyisturnedoffandlocked.
3. Removetheservicepanel(see‘removaloftheservicepanel’).
4. Disconnectalltherelayconnections.
5. Removethefixingscrewsofthecontactor.
6. Replacethe
relayinreverseorder.

Substitutionofaircirculationfan(entirety)
1. Checkthattheaircirculationfanhasstoppedrunning.
2. Beforestarting,ensurethattheelectricitysupplyisturnedoffandlocked.
3. Removetheservicepanel(see‘removaloftheservicepanel’).
4. Disconnect the electrical connections of the air circulation fan. These connections are on the electrical
connections
terminal(seethewiringdiagram).
5. Loosenthecablegland.
6. Pullthecablethroughthecableglandtowardsthemotor.
7. The air circulation fan can now be removed. Note: for safety reasons it is strongly recommended to wear
gloveswhensubstitutingtheaircirculationfan.
8. Replacethe
aircirculationfaninreverseorder.

Substitutionoftheprogramma ble roomthermostat
1. Checkthattheaircirculationfanhasstoppedrunning.
2. Beforestarting,ensurethattheelectricitysupplyisturnedoffandlocked.
3. Loosen the thermostat by pressing the spring mounted part of the fixing with a screwdriver and tipping it
carefullyupwards.Bydoingthisthethermostatwillloosen
fromthepanel.
4. Whensubstituting,protectthecontactsinthewall plateagainst paintandothersubstancesthatcandisturb
thefunctioning.
5. At the bottom there is a plastic screw. Turn this screw a quarter of a turn so that the valve inside the
thermostatcanopen.
6.
Oncethisvalveisopen,thetwowirestotheairheatercanbedisconnected.
7. Closethevalveagainandputtheplasticscrewbackinoriginalpositionsothatthevalveisclosedagain.
8. Removethefixingpointsbetweenthewallplateandthewall.
9. Replacethe
roomthermostatinreversedorder.


