installation manual

ManualsBrandsBosch Thermotechnology ManualsBoilersBosch Greenstar 79 - ZBR21 - 71K BTU - 95.0% AFUE - Hot Water Gas Boiler - Direct Vent

Table Of Contents

Information about the appliance | 13

6 720 806 992 (2013/07)Greenstar

Key to Fig. 6:

[1] Heatronic boiler control

[2] ON/OFF switch

[3] Burner flame indicator

[4] Service button

[5] Emissions test button

[6] Boiler high limit dial

[7] Mounting socket for outdoor reset controls

[8] DHW thermostat

[9] Key pad lock

[10] ECO button

[11] Reset button

[12] Display

[13] Condensate trap

[14] Test ports for inlet gas pressure

[15] Adjustment screw, minimum gas volume

[16] DHW temperature sensor

[17] Plate-type heat exchanger

[18] Automatic air vent

[19] Maximum gas adjuster

[20] Flue gas temperature limiter

[21] Combustion air intake

[22] Supply pipe

[23] Connection for optional low water cut off (LWCO)

[24] Additional supply temperature limiter

[25] Gas/air premix chamber

[26] Expansion vessel

[27] Fan

[28] Bracket

[29] Wall hanging bracket

[30] Exhaust pipe

[31] Sight glass

[32] Set of electrodes

[33] Supply temperature sensor

[34] Boiler block temperature limiter

[35] Inspection and cleanout cover

[36] Condensate collector

[37] Flow meter

[38] 3-way valve

[39] Drain cock

[40] Condensate drain hose

[41] Boiler circulator

[42] Pump speed switch

[43] Pressure relief valve (heating zone)

[44] Safety relief valve discharge hose

[45] Boiler water pressure gauge