SystemAir KA HSI-2-2-S-R-50F-TB2-L2 User Manual

56 systemair
• In order to isolate the casing of the gas heating coil section from the noise and vibrations generated by the fan
sectionupstream,applyaexibleconnectionmadeofanon-combustiblematerialresistanttohightemperatures.
• In order to isolate vibrations generated by the fan section upstream of the gas heating coil section, apply spring
vibration isolators.
• In order to equalise the electric potentials of the fan upstream and the gas heating coil, apply a non-insulated Cu
conductor.
Commissioning
• Thevolumeowrateoftheairpassingalongthecombustionchamberandtheheatexchangertuberegistermay
notdropundertheminimumvaluemandatoryforthecoolingoftheheatexchangerwalls.Therefore,checkthe
following before commissioning:
• the installation and operation of the heat exchanger outlet air temperature monitoring thermostat in a range from
50 °C to 60 °C,
• theinstallationandoperationofthedamperelectricmotoranditslimitswitch;intheeventofapowersupply
failure or any other fault that may result in the abrupt failure of unit interior cooling or its overheating, the damper
must open and allow natural cooling of the gas heating coil,
• thestoppingandblockingoftherestartingofthegasburnerbythemotordrivelimitswitchwhentheheat
exchangercoolingcontroldamperreachesan80%closedposition,
• theinstallationandoperationofthesafetyairowrategauge,thefunctionofwhichistostopthegasburnerinthe
eventofaninadequateairowratealongtheheatexchanger,
• the operation of the monitoring pressure switch, the function of which is to stop the gas burner in the event of
excessive positive pressure in the combustion chamber,
• the installation and operation of the protection thermostat, the function of which is to automatically stop the gas
burner in the event the air temperature in the chamber above the heat exchanger exceeds approx. 70 °C,
• the installation and operation of the safety thermostat (temperature limiter), the function of which is to stop the
gasburnerandblockitintheeventtheairtemperaturearoundtheheatexchangerexceedsapprox.90°C;inorder
to restart the gas burner, manual intervention must be required,
• the installation and operation of the time relay, the function of which is to prolong the operation of the supply fan
after the gas burner is stopped,
• thesealingoftheheatexchangerandtheextractionofuegases.
Maintenance
Onceamonth,checkthefollowing:
• the operation of the heat exchanger outlet air temperature monitoring thermostat in a range from 50 °C to 60 °C,
• the operation of the damper electric motor drive and its limit switch,
• theoperationofthestopping/blockingoftherestartingofthegasburnerbythemotordrivelimitswitchwhenthe
heatexchangercoolingcontroldamperreachesan80%closedposition,
• the operation of the time relay, the function of which is to prolong the operation of the supply fan after the gas
burner is stopped,
• theoperationofthesafetyairowrategauge,thefunctionofwhichistostopthegasburnerintheeventofan
inadequateairowratealongtheheatexchanger,
• the operation of the monitoring pressure switch, the function of which is to stop the gas burner in the event of
excessive positive pressure in the combustion chamber,
• the operation of the protection thermostat, the function of which is to automatically stop the gas burner in the
event the air temperature in the chamber surrounding the heat exchanger exceeds 70 °C,
• theoperationofthesafetythermostat(limiter),thefunctionofwhichistoautomaticallystopandblockthegas
burner in the event the air temperature in the chamber surrounding the heat exchanger exceeds 90 °C,
• thesealingoftheheatexchangerandtheextractionofuegases.

SystemAir KA HSI-2-2-S-R-50F-TB2-L2 Specifications

General

Brand	SystemAir
Model	KA HSI-2-2-S-R-50F-TB2-L2
Category	Fan
Language	English