Page 1: ...in line voltage low voltage or millivolt systems 0 The sensing element is installed directly in the plenum duct v o The liquid filled element operates indepen dently of changes in pressure 0 Electrical circuits are switched by reliable snap switches 0 Temperature settings are adjustable U Fast response sensing elements o The sensing element may be bent away from an obstruction if necessary 0 Model...
Page 2: ... 42 48 24 0 25 amp at 0 25 to 12V dc limit only Maximum connected load 2000 VA MAXIMUM AMBIENT TEMPERATURE 190 F 88 C at switches and 300 F 149 C at sensing element LIMIT DIFFERENTIAL Fixed at 25 F 14 C SWITCH ACTION Fan switch makes at set point adjustable differential model and limit switch breaks at set point on temperature rise Fan switch breaks at set point on model with fixed differential on...
Page 3: ...Part No 106638 is provided to slip over the capillary for air seal between the element clearance hole and the diaphragm power head see Fig 4 Since the ambient temperature rating is 190 F 88 C at the switches this heat barrier should be adequate for all normal applications Locate element where it will be exposed to rapid temperature changes in the furnace After the fan starts the element temperatur...
Page 4: ...y with applicable local codes and ordinances Follow the system wiring diagrams furnished with the burner Figs 7 and 8 illustrate the connections to the L4017 For ease in wiring 2 conduit knockouts are furnished at the bottom and 1 at the top of the case A jumper is provided between the fan and the limit terminals This jumper is used when both the fan and the limit switches are switching line volta...
Page 5: ...manufacturer s instructions for placing the furnace in operation If a manual re set Pilotstat control is used make sure that it is holding in 2 Set the thermostat and limit control to call for heat The main burner should light 3 To check the high limit control disconnect the fan motor and close all dampers Set thermostat to call for heat Main burner should light When plenum temperature reaches lim...
