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Safety Information

Safe operation of these products can only be guaranteed if 

they are properly installed, commissioned, used and maintained 

by qualified personnel (see Section 1.11) in compliance with 

the  operating  instructions.  General  installation  and  safety 

instructions for pipeline and plant construction, as well as the 

proper use of tools and safety equipment must also be complied 

with.

1.1  Intended use

Referring to the Installation and Maintenance Instructions, 

name-plate and Technical Information Sheet, check that the 

product is suitable for the intended use / application. 
i)  The products have been specifically designed for use on 

steam, air or water/condensate. The products’ use on other 

fluids may be possible but, if this is contemplated, Spirax 

Sarco should be contacted to confirm the suitability of the 

product for the application being considered.

ii)  Check material suitability, pressure and temperature and 

their  maximum  and  minimum  values.  If  the  maximum 

operating limits of the product are lower than those of the 

system in which it is being fitted, or if malfunction of the 

product  could  result  in  a  dangerous  overpressure  or 

overtemperature  occurrence,  ensure  a  safety  device  is 

included in the system to prevent such over-limit situations.

iii)  Determine the correct installation situation and direction 

of fluid flow. 

iv)  Spirax Sarco products are not intended to withstand external 

stresses that may be induced by any system to which they 

are fitted. It is the responsibility of the installer to consider 

these stresses and take adequate precautions to minimise 

them.

v)  Remove  protection  covers  from  all  connections  and 

protective film from all name-plates, where appropriate, 

before installation on steam or other high temperature 

applications.

1.2  Access

Ensure safe access and if necessary a safe working platform 

(suitably guarded) before attempting to work on the product. 

Arrange suitable lifting gear if required.

1.3  Lighting

Ensure adequate lighting, particularly where detailed or intricate 

work is required.

1.4  Hazardous liquids or gases in the pipeline

Consider what is in the pipeline or what may have been in the 

pipeline at some  previous time. Consider: flammable materials, 

substances hazardous to health, extremes of temperature.

1.5  Hazardous environment around the product

Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), 

dangerous gases, extremes of temperature, hot surfaces, fire 

hazard  (e.g.  during  welding),  excessive  noise,  moving 

machinery.

1.6  The system

Consider  the  effect  on  the  complete  system  of  the  work 

proposed.  Will  any  proposed  action  (e.g.  closing  isolation 

valves, electrical isolation) put any other part of the system or 

any personnel at risk? 

Dangers might include isolation of vents or protective devices 

or  the  rendering  ineffective  of  controls  or  alarms.  Ensure 

isolation valves are turned on and off in a gradual way to avoid 

system shocks.

1.7  Pressure systems 

Ensure  that  any  pressure  is  isolated  and  safely  vented  to 

atmospheric pressure. Consider double isolation (double block 

and bleed) and the locking or labelling of closed valves. Do not 

assume  that  the  system  has  depressurised  even  when  the          

pressure gauge indicates zero.

1.8  Temperature

Allow time for temperature to normalise after isolation to avoid 

danger of burns.

1.9  Tools and consumables

Before starting work ensure that you have suitable tools and / or 

consumables  available.  Use  only  genuine  Spirax  Sarco 

replacement parts.

1.10  Protective clothing

Consider whether you and / or others in the vicinity require any 

protective clothing to protect against the hazards of, for example, 

chemicals,  high / low  temperature,  radiation,  noise,  falling 

objects, and dangers to eyes and face.

1.11  Permits to work

All work must be carried out or be supervised by a suitably 

competent person. Installation and operating personnel should 

be trained in the correct use of the  product according to the 

Installation and Maintenance Instructions.

Where a formal ‘permit to work’ system is in force it must be 

complied with. Where  there is no such system, it is recommended 

that a responsible person should know what work is going on 

and,  where  necessary,  arrange  to  have  an  assistant  whose 

primary responsibility is safety.

Post ‘warning notices’ if necessary.

1.12  Handling

Manual handling of large and/or heavy products may present 

a risk of injury. Lifting, pushing, pulling, carrying or supporting 

a load by bodily force can cause injury particularly to the back. 

You are advised to assess the risks taking into account the 

task, the individual, the load and the working environment and 

use the appropriate handling method depending on the 

circumstances of the work being done.

Summary of Contents for RediHeat RH-120

Page 1: ...temperature stabilization adjustment table 5 2 3 RH 90 120 temperature stabilization adjustment table 6 2 4 Rediheat with recirculation system start up 7 3 Maintenance 7 3 1 Blending valve disassembly...

Page 2: ...h extremes of temperature 1 5 Hazardousenvironmentaroundtheproduct Consider explosionriskareas lackofoxygen e g tanks pits dangerous gases extremes of temperature hot surfaces fire hazard e g during w...

Page 3: ...ed in writing includingHealthandSafetydatasheetsrelating to any substances identified as hazardous or potentially hazardous 1 17 Working safely with cast iron products on steam Cast iron products are...

Page 4: ...compression fitting on the sensing line at the upper diaphragm cover Permit water to flow until free of any air Retighten fitting 4 A steam side vent valve should be installed on either of the vent co...

Page 5: ...ig 2 psig 5 psig 10 psig 15 psig 120 25 24 23 22 15 14 13 12 140 30 30 30 30 30 28 25 20 150 30 30 30 30 30 30 27 25 160 30 30 30 30 30 180 30 30 30 30 30 60 F 120 22 21 20 19 12 11 10 9 140 25 24 23...

Page 6: ...10 psig 15 psig 120 25 24 23 22 15 14 13 12 140 27 27 25 24 22 22 23 20 150 30 30 30 30 27 27 27 25 160 30 30 30 30 30 30 30 30 180 30 30 30 30 30 30 30 30 60 F 120 22 21 20 19 12 11 10 9 140 25 24 23...

Page 7: ...agm cover 5 Note position of notch in cover relative to the valve body 3 Disconnect Victaulic couplings at all valve connections and remove the valve 4 Loosen and remove casing bolts 14 and lift off t...

Page 8: ...e heat exchanger by disassembling the four Victaulic couplings 2 Attach the 3 8 nipple supplied with the acid cleaning system adaptor kit to one of the adaptors 3 Insert this adaptor into the heater c...

Page 9: ...p check the setting of the thermostatic valve The thermostatic element setting should be approximately 10 F below the normal operating temperature of the RediHeat For example if 120 F is the desired l...

Page 10: ...s with adjustable elements are also available see section D Water flow in the system is governed by the temperature of the recirculating loop When the loop is at the desired temperature the flow of re...

Page 11: ...he water heater temperature variations up to 10 F may be experienced in the loop temperature 4 If an adjustable diverting valve has been fitted the recirculated temperature should be adjusted with all...

Page 12: ...SPIRAX SARCO INC 1150 NORTHPOINT BLVD BLYTHEWOOD SC 29016 PHONE 803 714 2000 FAX 803 714 2200 www spiraxsarco com global us Spirax Sarco Applications Engineering Department Toll Free at 1 800 883 441...

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