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26

Natural Draft Vertical Venting
System Installation

Natural draft venting uses the natural buoyancy of the
heated flue products to create a thermal driving head
that expels the exhaust gases from the flue. The neg-
ative draft must be within the range of -.01 in. to -.08
in. WC as measured 12 in. from the appliance flue out-
let to ensure proper operation. Vent material must be
listed by a nationally recognized test agency.

The maximum and minimum venting length for
Category I appliance shall be determined per the lat-
est edition of the NFGC (U.S.) or B149 Installation
Code (Canada).

The diameter of vent flue pipe should be sized accord-
ing to Part 11 of the latest edition of the NFGC (U.S.)
and part 7 and appendix B of the B149 Installation
Code (Canada). The minimum flue pipe diameter for
conventional negative draft venting using double-wall
B type vent is 4” for 122, 5” for 162, 202 and 242, 6”
for 322.

The connection from the appliance vent to the stack
must be as direct as possible and shall be the same
diameter as, or larger than the vent outlet. The hori-
zontal breaching of a vent must have an upward slope
of not less than 1/4 inch per linear foot from the heater
to the vent terminal. The horizontal portions of the vent
shall also be supported for the design and weight of
the material employed to maintain clearances and to
prevent physical damage or separation of joints.

Natural Draft Vertical Vent
Termination

The vent terminal should be vertical and should termi-
nate outside the building at least two (2) feet above the
highest point of the roof that is within 10 feet. The vent
cap should have a minimum clearance of four (4) feet
horizontally from and in no case above or below
(unless a four (4) foot horizontal distance is main-
tained) electric meters, gas meters, regulators and
relief equipment. The distance of the vent terminal
from adjacent public walkways, adjacent buildings,
open windows and building openings must be consis-
tent with the NFGC, or in Canada, the B149
Installation Code for Gas Burning Appliances and
Equipment. Gas vents supported only by flashing and
extended above the roof more than five feet should be
securely guyed or braced to withstand snow and wind
loads.

Natural Draft Vertical Venting with
Common Venting System, Category I
Appliance Only

Manifolds that connect more than one heater to a com-
mon chimney must be sized to handle the combined
load. Consult available guides for proper sizing of the
manifold and the chimney. At no time should the area
of the vent be less than the area of the largest heater
exhaust outlet.

Common venting systems may be too large when an
existing unit is removed. At the time of removal of an
existing appliance, the following steps must be fol-
lowed with each appliance remaining connected to the
common venting system placed in operation, while the
other appliances remaining connected to the common
venting system are not in operation.

a)  Seal any unused opening in the common venting

system.

b)  Visually inspect the venting system for proper size

and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion or other
unsafe condition.

c)  Insofar as is practical, close all building doors and

windows and all doors between the space in which
the appliances remaining connected to the com-
mon venting system are located and other spaces
of the building. Turn on clothes dryers and any
appliance not connected to the common vent sys-
tem. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will oper-
ate at maximum speed. Do not operate summer
exhaust fan. Close fireplace dampers.

d)  Place in operation the appliances being inspected.

Follow the manufacturers instructions for lighting

NOTE:

Vent Adapter will have to be used to connect

B vent to the unit.

CAUTION:

Listed vent cap terminal must be used

and sized adequately to evacuate the flue products
from the heaters.

WARNING:

Vent connectors serving appliances

vented by natural draft shall not be connected into
any portion of mechanical draft systems operating
under a positive pressure.

CAUTION:

Vent connectors for natural draft

venting systems must be type “B” vent or better.

Содержание HI DELTA 122-322

Страница 1: ...To do so may result in an explosion or fire WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your...

Страница 2: ...The text in the BEFORE INSTALLATION section on page 5 the text in paragraph one of the GENERAL SAFETY section on page 8 the text in paragraph one of the Outdoor Installations section on page 10 Table...

Страница 3: ...ions 19 Venting 21 Outdoor Installation 32 High Limit Manual Reset 33 Flow Switch 33 CONTROLS 33 Ignition Control Module 33 Low Water Cut Off Optional 34 Operating Control 34 WIRING DIAGRAM MODELS 122...

Страница 4: ...required to deenergize the equipment before servicing CAUTION Operation of this heater in low temperature systems requires special piping Harmful internal condensation will occur if the inlet water t...

Страница 5: ...er the manufacturer s warranty Debits for defec tive replacement parts will not be accepted Parts will be replaced in kind only per Raypak s standard war ranties Model Identification The model identif...

Страница 6: ...GAS CONNECTION VIEW PORT PRESSURE RELIEF CONNECTION FLUE EXHAUST COMBUSTION AIR INTAKE Component Locations Fig 1 Component Locations Back Fig 2 Component Locations Left Side Panels removed for clarity...

Страница 7: ...ntake 122 3 2 1 4 5 162 4 2 1 5 5 202 5 2 1 5 5 242 6 2 1 5 5 322 8 2 1 6 5 Model No Burners per Valve Stages Fire at Stage A B 1 2 1 2 122 2 1 A AB 66 100 162 3 1 A AB 75 100 202 3 2 A AB 60 100 242...

Страница 8: ...mometer in the hot water stream and read the thermometer NOTE When this water heater is supplying general purpose hot water for use by individuals a thermostatically controlled mixing valve for reduci...

Страница 9: ...he heater should be mounted on a level structurally sound surface The heater is approved for installation on a combustible surface but must NEVER be installed on carpeting Gas fueled equipment install...

Страница 10: ...tray In either case the heater must be installed in a manner that will enable the heater to be serviced without removing any structure around the heater Heater Side Min Clearance from Combustible Surf...

Страница 11: ...quipment in the enclosure b Where communicating with the outdoors through horizontal ducts each opening shall have a minimum free area of 1 sq in per 2000 Combustion and Ventilation Air Indoor Units T...

Страница 12: ...and there is no draft regulator drafthood or similar flue gas dilution device installed in the same space in addition to the opening for ventilation air required in 1 there shall be a permanent air s...

Страница 13: ...1 0 40 44 11 8 9 322 27 4 70 18 2 2 14 1 4 40 44 12 2 12 Table F Heater Rates of Flow and Pressure Drops Flow switch when used will not activate at less than 12 gpm NOTE Basis for minimum flow 10 gpm...

Страница 14: ...14 Fig 9 Single Boiler Low Temperature Application Heat Pump Primary Secondary Piping Fig 10 Dual Boiler Primary Secondary Piping...

Страница 15: ...rovided with a low water cut off device The boiler when used in connec tion with a refrigeration system must be installed so the chilled medium is piped in parallel with the boiler with appropriate va...

Страница 16: ...16 Fig 11 Single Heater Domestic Hot Water with One Storage Tank...

Страница 17: ...pletely dilut ed into the pool or spa water before being circulated through the heater Do not place chlorine tablets or bromine sticks in the skimmer High chemical concen trations will result when the...

Страница 18: ...3 5 0 1 in WC for natural gas and 10 5 in 0 1 in WC for propane gas If an adjustment is needed turn the adjustment screw clockwise to increase pressure or counter clockwise to decrease pressure CAUTIO...

Страница 19: ...re as supplied with the heater must be replaced it must be replaced with 105 C wire or its equivalent Check the Power Source AC 108 Volts AC Minimum 132 Volts AC MAX AB 108 Volts AC Minimum 132 Volts...

Страница 20: ...ol at the setpoint in which you want the heater to maintain Ensure that the sens ing bulb of the control is at the point in the system that will best maintain the temperature you want For example when...

Страница 21: ...ids excessive condensate pro duction in the vent Category II A heater which operates with a non posi tive vent static pressure and with a vent gas temperature that may cause excessive condensate produ...

Страница 22: ...s for proper opera tion Support of Vent Stack The weight of the vent stack or chimney must not rest on the heater vent connection Support must be pro vided in compliance with applicable codes The vent...

Страница 23: ...e 4 ft 1 2m below or to side of opening 1 ft 30 cm above opening 3 ft 91 cm K Clearance to mechanical air supply inlet 3 ft 91 cm above if within 10 ft 3m horizontally 6 ft 1 83m L Clearance above pav...

Страница 24: ...bove or below unless four 4 feet horizontal distance is maintained from elec tric meters gas meters regulators and relief equipment e Terminate vent at least six 6 feet away from adja cent walls f DO...

Страница 25: ...l be in accordance with the section on Venting of Equipment of the latest edition of NFGC or in Canada B149 Installation Code for Gas Burning Appliances and Equipment or applicable pro visions of loca...

Страница 26: ...e B149 Installation Code for Gas Burning Appliances and Equipment Gas vents supported only by flashing and extended above the roof more than five feet should be securely guyed or braced to withstand s...

Страница 27: ...TION AIR FILTER BOILER UNIT Fig 19 Horizontal Thru Wall Venting Category III g Any improper operation of the common venting system should be corrected so that the installation conforms with the latest...

Страница 28: ...n of condensate in the vent pipes It is rec ommended that a The vent be installed with a slight downward slope of not more than 1 4 per foot of horizontal run to the vent terminal b The vent be insula...

Страница 29: ...ce Category Certified Venting Material Vent Size inches Max Venting Length feet Combustion Air Intake Pipe Material Air Inlet Size inches Max Air Intake Length feet 122 III Stainless Steel Gas Tight 4...

Страница 30: ...rminal In this case an approved conden sate trap must be installed per applicable codes b The vent be insulated through the length of the horizontal run Horizontal Thru wall Direct Vent Termination Th...

Страница 31: ...l Vent Size inches Min Max Vertical Venting Height feet Combustion Air Intake Pipe Material Air Inlet Size inches Max Air Intake Length feet 122 I Type B Equivalent 4 5 25 Galvanized Steel PVC ABS CPV...

Страница 32: ...d to withstand snow and wind loads The vertical direct vent cap is designed for roof top mounting only The air inlet opening MUST be installed one 1 foot above the roof line or above normal snow level...

Страница 33: ...eater is equipped with a manual reset high limit temperature device Push the reset button and adjust the setting to 30 F or 40 F above desired operating temperature WARNING Installation adjustment and...

Страница 34: ...emporary conditions such as power fluctuations or air pockets Fig 24 Flow Switch Fig 25 Low Water Cut Off Flow Switch Dual purpose control shuts off heater in case of pump failure or low water flow Mo...

Страница 35: ...35 WIRING DIAGRAM MODELS 122 322...

Страница 36: ...neigh bor s telephone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department 4 Use only your hand to push in or turn the gas con trol knob Never use tool...

Страница 37: ...o original position Main Burner Adjustment 1 Turn off unit 2 Open manual firing valve 3 Turn on the unit wait 15 seconds and the igniter should glow Sight glass to check igniter at both ends of the he...

Страница 38: ...e Turn on manual gas valve Turn power on Set thermostat to call for heat When the unit is in operation Disconnect combus tion air blower pressure switch burner should go off immediately Wait 5 minutes...

Страница 39: ...ay be performed by the owner Yearly Beginning of each heating season 1 Annual service call by qualified service agency 2 Visually check top of vent for soot Call service person to clean Some sediment...

Страница 40: ...g contaminants listed below which will induce acidic condensation you want to reduce infiltration into your building through openings around windows and doors you are using AL29 4C stainless steel ven...

Страница 41: ...all applicable warranty conditions found satisfied The replacement part will be warranted for only the unexpired portion of the original warranty Raypak makes no warranty whatsoever on parts not manuf...

Страница 42: ...42...

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Страница 44: ...www raypak com Raypak Inc 2151 Eastman Avenue Oxnard CA 93030 805 278 5300 Fax 805 278 5468 Litho in U S A...

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