Operating instructions

ManualsBrandsBurnham ManualsDomestic Appliancesoperating and

ATTENTION TO BOILER WHILE IN OPER-

ATION.

a. On steam boilers at the start of each heating season

and once or twice during the season try SAFETY

VALVE to be sure it is in working condition. A

try lever test should be performed as follows: with

the boiler under a minimum of 5 psi pressure, lift

the try lever on the safety valve to the wide open

position and allow steam to be discharged for 5 to

sec. release the try lever and allow the spring

to snap the disk to the closed position. If valve

leaks operate lever two or three times to seat disk

properly. If valve continues to simmer it must be

replaced or repaired. It is advisable to have a

chain or wire attached to lever of valve so test can

be conducted in a safe manner.

b. On a water system at the start of each heating sea-

son and once or twice during the season try safety

relief valve to be sure it is in working condition.

A try lever test should be performed as follows:

1) Lift the try lever to the open position and hold

it open for at least 5

sec or until clear water is discharg-

ed.

2) Release the lever and allow the spring to snap the

disk to the closed position.

If the valve leaks, operate

the try lever two or three

times to clear the seat of any

object that is preventing proper seating. As safety re-

lief valves are normally piped to the floor or near a floor

drain. it may take some time to determine if the valve

has shut completely.

3) If the safety relief valve continues to leak it shall

be replaced with

new valve, returned to the manufac-

turer for repair or field repaired by the manufacturer.

ATTENTION TO BOILER WHILE NOT IN

OPERATION.

The boiler and steam system should be

inspected

least once each year by a competent .service-

man to insure continued reliable, safe operation.

Clean Boiler as follows at the end of each heating

season.

a. Remove upper right hand jacket panel by remov-

ing screws, lifting and swinging out bottom of panel

using two finger holes.

b. Access to boiler flue ways may be gained by remov-

ing nuts and washers securing cast iron

cleanout

covers. Refer to Figure 5..

c. Thoroughly clean flue ways using a flue brush.

Remove and clean smokepipe where feasible.

e. Replace smokepipe and cleanout covers.

f. Replace upper right hand jacket panel.

TANKLESS HEATER PERFORMANCE

Tankless

water heater ratings for PF-3 boilers (steam

and water) are given in gallons per minute continuous

draw of water heated from 40°F to 140°F with 200°F

boiler water.

Tankless Water

(

Boiler Model Heater Number Pressure

Number 226 232 445 Drop (psi)

PF-34 6.0

PF-35 6.0 7.5

PF-36

6.0 7.5 9.0 37

PF-37

6.0 7.5 9.0 37

FLOW REGULATION-If flow through the heat-

er is greater than its rating, the supply of adequate hot

water may not be able to keep up with the demand. For

this reason a FLOW REGULATOR matching the heater

rating should be installed in the cold water line to the

heater. The flow regulator should preferably be located

below the inlet to the heater and

minimum of 3' away

from the inlet so that the regulator is not subjected to

excess temperatures that may occur during "off" periods

when it is possible for heat to be conducted back through

the supply line. The flow regulator also limits the flow

of supply water regardless of inlet press variations in the

range of 20 to 125 psi.

TEMPERING OF HOT WATER

Installation of

a tempering or mixing valve will lengthen the delivery of

the available hot water by mixing some cold water with

the hot. This prevents excessive and possibly scalding

hot water at the fixtures. In addition, savings of hot

water will be achieved since the user will not waste as

much hot water while seeking water temperatures to his

liking. Higher temperature hot water required by dish-

washers and automatic washers is possible by piping the

hot water from the heater prior to entering the mixing

valve. The mixing valve should be "trapped" by install-

ing it below the cold water inlet to heater to prevent lime

formation in the valve.

FLUSHING OF HEATER

All water contains

some sediment which settles on the inside of the coil.

Consequently, the heater should be periodically back-

washed. This is accomplished by installing hose bibs as

illustrated and allowing water at city pressure to run

into hodebib A, through the heater, and out hosebib B

until the discharge is clear. The tees in which the hose

bibs are located should be the same size as heater con-

nections to minimize pressure drop.

(?)

HARD WATER

This is applicable to some city

water and particularly to well water. This should not

be a deterent but precautions are necessary. A water

analysis

is necessary and an appropriate water softe-

ncr installed.

This is not only beneficial to the heater

but to piping and fixtures plus the many other benefits

derived from soft water.

SAFETY

RELIEF

VALVE

TANKLESS

HEATER

TEMPERED

HIGH TEMP.

WATER FOR

HOT WATER AUTOMATIC

TO FAUCETS

AND SHOWERS

COLD

GLOBE VALVE

WATE~

SQ.

HD. COCK

SUPPLY

;

IN COLD WATER

LINE AT LEAST

FEET

AHEAD OF TANKLESS

HEATER

SCHEMATIC

TANKLESS HEATER PIPING

Fig.